chore: name of first year folder

56 files changed, 0 insertions, 5320 deletions

diff --git a/I_anno/Programmazione_2/algorithms/binarysearch.cc b/I_anno/Programmazione_2/algorithms/binarysearch.cc
deleted file mode 100644
index c9b4cd7..0000000
--- a/I_anno/Programmazione_2/algorithms/binarysearch.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-bool bs(int a[], int i, int j, int x) {
-    if(j<i) return false;
-    int mid = i+(j-i)/2;
-    if(a[mid] == x)
-        return true;
-    if(a[mid] > x)
-        return bs(a, i, mid-1, x);
-    return bs(a, mid+1, j, x);
-}
-
-bool bs2(int a[], int i, int j, int x) {
-    while(i <= j) {
-        int mid = i+(j-i)/2;
-        if(a[mid] == x) return true;
-        if(a[mid] < x)
-            i = mid+1;
-        else
-            j = mid-1;
-    }
-    return false;
-}
-
-int main() {
-    int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-    for(int i = 0; i < 12; ++i)
-        cout << i << ' '<<bs(a, 0, 9, i) << ' ' << bs2(a, 0, 9, i) << endl;
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/algorithms/cbrt.cc b/I_anno/Programmazione_2/algorithms/cbrt.cc
deleted file mode 100644
index 30c7792..0000000
--- a/I_anno/Programmazione_2/algorithms/cbrt.cc
+++ /dev/null
@@ -1,37 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-int cbrt(int n) {
-    int i = 0;
-    int j = n;
-    int q = (i+j)/2;
-    while(q*q*q != n) {
-        q = (i+j)/2;
-        if(q*q*q < n)
-            i=q;
-        else
-            j=q;
-    }
-    return q;
-}
-
-double cbrt2(int n) {
-    int i = 1;
-    while(i*i*i <= n)
-        ++i;
-    // precision
-    
-    --i;
-    while(i*i*i < n)
-        i+=0.000001;
-    
-    return i;
-}
-
-int main() {
-    int i;
-    cin >> i;
-    cout << i << ' ' << cbrt(i) << endl;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/insertionsort.cc b/I_anno/Programmazione_2/algorithms/insertionsort.cc
deleted file mode 100644
index 9b309d6..0000000
--- a/I_anno/Programmazione_2/algorithms/insertionsort.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-void insertionsort(int a[], int n) {
-    for(int i = 1; i < n; ++i) {
-        int j = i-1;
-        int key = a[i];
-        while(j > -1 && a[j] > key) {
-            swap(a[j+1], a[j]);
-            --j;
-        }
-        a[j+1] = key;
-    }
-}
-
-void insertionsort_rec(int a[], int n) {
-    if(n < 2) return;
-    insertionsort_rec(a, n-1);
- 
-    int key = a[n-1];
-    int j = n-2;
-
-    while(j > -1 && a[j] > key) {
-        swap(a[j+1], a[j]);
-        --j;
-    }
-
-    a[j+1] = key;
-
-}
-
-int main() {
-    int arr[10] = {3, 450, 12, 4, -1, 0, 24, 95, 123, 0};
-    for(int i = 0; i < 10; ++i)
-        cout << *(arr+i) << ' ';
-    cout << endl;
-    insertionsort_rec(arr, 10);
-    for(int i = 0; i < 10; ++i)
-        cout << *(arr+i) << ' ';
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/log.cc b/I_anno/Programmazione_2/algorithms/log.cc
deleted file mode 100644
index 1e49a2e..0000000
--- a/I_anno/Programmazione_2/algorithms/log.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-double log(double n) {
-    if(n <= 2) return 1.0;
-    return 1.0 + log(n/2);
-}
-
-int log2(double n) {
-    int a = 1;
-
-    while(n > 2) {
-        n /= 2;
-        ++a;
-    }
-
-    return a;
-}
-
-int main() {
-    for(int i = 0; i < 25; ++i)
-        cout << i << ' ' << log(i) << ' ' << log2(i) << endl;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/mergesort.cc b/I_anno/Programmazione_2/algorithms/mergesort.cc
deleted file mode 100644
index 68d28cb..0000000
--- a/I_anno/Programmazione_2/algorithms/mergesort.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-void merge(int A[], int l, int q, int r) {
-    int i = l;
-    int j = q+1;
-    int k = l;
-    int B[r];
-
-    while((i <= q) && (j <= r)) {
-        if(A[i] <= A[j])
-            B[k] = A[i++];
-        else
-            B[k] = A[j++];
-
-        k++;
-    }
-
-    while(i <= q)
-        B[k++] = A[i++];
-
-    while(j <= r)
-        B[k++] = A[j++];
-
-    for(k = l; k <= r; ++k) 
-        A[k] = B[k];
-}
-
-void mergesort(int A[], int l, int r) {
-    if(l < r) {
-        int q = (l+r)/2;
-        mergesort(A, l, q);
-        mergesort(A, q+1, r);
-        merge(A, l, q, r);
-    }
-}
-
-
-int main() {
-    int a[] = {7,1,22,3,2,12,27,31,6};
-    for(int i = 0; i < 9; ++i) {
-        cout << a[i] << ' ';
-    }
-    cout << endl;
-    mergesort(a, 0, 8);
-    for(int i = 0; i < 9; ++i) {
-        cout << a[i] << ' ';
-    }
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/pow.cc b/I_anno/Programmazione_2/algorithms/pow.cc
deleted file mode 100644
index 16cf419..0000000
--- a/I_anno/Programmazione_2/algorithms/pow.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-int pow(int x, int y) {
-    int a = 1;
-    
-    for(int i = 0; i < y; ++i)
-        a*=x;
-    
-    return a;
-}
-
-
-int pow2(int x, int y) {
-    if(y < 1) return 1;
-    
-    return x*pow(x, y-1);
-}
-
-int main() {
-    cout << pow(2, 5) << endl;
-    cout << pow2(2, 5) << endl;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/quicksort.cc b/I_anno/Programmazione_2/algorithms/quicksort.cc
deleted file mode 100644
index 795bd7b..0000000
--- a/I_anno/Programmazione_2/algorithms/quicksort.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-int partition(int A[], int l, int r) {
-    int x = A[r];
-    int i = l-1;
-
-    for(int j = l; j < r; ++j) {
-        if(A[j] <= x) {
-            swap(A[++i], A[j]);
-        }
-    }
-    swap(A[++i], A[r]);
-    return i;
-}
-
-void quicksort(int A[], int l, int r) {
-    if(l < r) {
-        int q = partition(A, l, r);
-        quicksort(A, l, q-1);
-        quicksort(A, q+1, r);
-    }
-}
-
-int main() {
-    int a[] = {7,1,22,3,2,12,27,31,6};
-    for(int i = 0; i < 9; ++i) {
-        cout << a[i] << ' ';
-    }
-    cout << endl;
-    quicksort(a, 0, 8);
-    for(int i = 0; i < 9; ++i) {
-        cout << a[i] << ' ';
-    }
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/selectionsort.cc b/I_anno/Programmazione_2/algorithms/selectionsort.cc
deleted file mode 100644
index 57dcc17..0000000
--- a/I_anno/Programmazione_2/algorithms/selectionsort.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-#include<iostream>
-#include<algorithm>
-
-using namespace std;
-
-void selectionsort(int a[], int n) {
-    for(int i = 0; i < n-1; ++i) {
-        int min = i;
-        for(int j = i+1; j < n; ++j) {
-            if(a[j] < a[min])
-                min = j;
-        }
-
-        swap(a[min], a[i]);
-    }
-}
-
-int min_i(int a[], int i, int j) {
-    if(i == j) return i;
-
-    int k = min_i(a, i+1, j);
-    return (a[i] < a[k]) ? i : k;
-}
-
-void selectionsort_rec(int* a, int b, int e=0) {
-    if(b == e) return;
-
-    int key = min_i(a, e, b-1);
-    if(key != e)
-        swap(a[key], a[e]);
-
-    selectionsort_rec(a, b, e+1);
-}
-
-int main() {
-    int arr[] = {3,450,12,4,-1,0,24,95,123,0};
-    for(int i = 0; i < 10; ++i) {
-        cout << *(arr+i) << ' ';
-    }
-    cout << endl;
-    selectionsort_rec(arr, 10);
-    for(int i = 0; i < 10; ++i) {
-        cout << *(arr+i) << ' ';
-    }
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/algorithms/sqrt.cc b/I_anno/Programmazione_2/algorithms/sqrt.cc
deleted file mode 100644
index aa6b032..0000000
--- a/I_anno/Programmazione_2/algorithms/sqrt.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-double abs(double n) {
-    if(n < 0) return -n;
-
-    return n;
-}
-
-
-double sq(int n) {
-    double x = n;
-    double y = 1;
-    while(x-y > 0.0000001) {
-        x = (x+y)/2;
-        y = n/x;
-    }
-    return x;
-}
-
-double sq2_n(double n, double a) {
-    if(abs(a*a - n) <= 0.000001) {
-        return a;
-    }
-
-    return sq2_n(n, (a+n/a)/2);
-}
-
-double sq2(int n) {
-    return sq2_n(n, n/2);
-}
-
-double sqrt_d(int n) {
-    double x = 1;
-    while(abs(x*x-n)>=0.0000001) {
-        x = ((n/x)+x)/2;
-    }
-    return x;
-}
-
-int main() {
-    cout << sq(81) << endl;
-    cout << sq2(81) << endl;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/dolcetti.cpp b/I_anno/Programmazione_2/coding_contest/dolcetti.cpp
deleted file mode 100644
index c3409a4..0000000
--- a/I_anno/Programmazione_2/coding_contest/dolcetti.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<queue>
-#include<vector>
-
-using namespace std;
-
-int main() {
-    using tii = tuple<int, int, int>;
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int N;
-        in >> N;
-
-        priority_queue<tii, vector<tii>> pq;
-        tii qq;
-        for(int i = 0; i < N; ++i) {
-            int e1, e2;
-            in >> e1 >> e2;
-            get<0>(qq) = e1-e2;
-            get<1>(qq) = e1;
-            get<2>(qq) = e2;
-
-            pq.push(qq);
-        }
-        
-        int counter = N;
-        int sum{};
-
-        while(counter-- > N/2) {
-            qq = pq.top();
-            sum += get<1>(qq);
-            pq.pop();
-        }
-
-        while(!pq.empty()) {
-            qq = pq.top();
-            sum += get<2>(qq);
-            pq.pop();
-        }
-
-        out << sum << endl;
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/coding_contest/gita.cpp b/I_anno/Programmazione_2/coding_contest/gita.cpp
deleted file mode 100644
index cbb4910..0000000
--- a/I_anno/Programmazione_2/coding_contest/gita.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<vector>
-#include<map>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-    
-    for(int c = 0; c < 100; ++c) {
-        int N, L;
-        in >> N >> L;
-        vector<pair<short, int>> students;
-        for(int i = 0; i < N; ++i) {
-            int num;
-            in >> num;
-            students.push_back({num, 0});
-        }
-
-        int index, val;
-        for(int i = 0; i < L; ++i) {
-            in >> index >> val;
-            students[index].second += val;
-        }
-
-        vector<pair<short, int>> errors;
-        short _j{};
-        for(auto const& i : students) {
-            if(i.second < i.first) {
-                errors.push_back({_j, i.first-i.second});
-            }
-            _j++;
-        }
-
-        out << errors.size() << ' ';
-        for(auto const& i : errors) {
-            out << i.first << ' ' << i.second << ' ';
-        }
-        out << endl;
-    }
-    out.close();
-    in.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/gribaudo.cpp b/I_anno/Programmazione_2/coding_contest/gribaudo.cpp
deleted file mode 100644
index 39d0e42..0000000
--- a/I_anno/Programmazione_2/coding_contest/gribaudo.cpp
+++ /dev/null
@@ -1,47 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<fstream>
-
-using namespace std;
-
-int maxpath(vector<vector<int>>& v) {
-    for(int i = v.size()-2; i >= 0; --i) {
-        for(int j = 0; j <= i; ++j) {
-            if(v[i+1][j] > v[i+1][j+1]) {
-                v[i][j] += v[i+1][j];
-            } else {
-                v[i][j] += v[i+1][j+1];
-            }
-        }
-    }
-
-    return v[0][0];
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 1; ++ts) {
-        int N;
-        in >> N;
-        vector<vector<int>> triangle;
-
-        for(int i = 0; i < N; ++i) {
-            int e;
-            triangle.push_back(vector<int>{});
-            int j;
-            for(j = 0; j <= i; ++j) {
-                in >> e;
-                triangle[i].push_back(e);
-            }
-            for(; j < N; ++j) 
-                triangle[i].push_back(0);
-        }
-        out << maxpath(triangle) << endl;
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/gualtieri.cpp b/I_anno/Programmazione_2/coding_contest/gualtieri.cpp
deleted file mode 100644
index f8a0ecf..0000000
--- a/I_anno/Programmazione_2/coding_contest/gualtieri.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<map>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string P{}, L{};
-        in >> P;
-        in >> L;
-        map<char, int> chars;
-
-        for(auto const& c : P) {
-            (chars.find(c) == chars.end()) ? chars[c] = 1 : chars[c]+=1;
-        }
-        int lenn = L.length();
-        int lenp = P.length();
-        int counter{};
-
-        for(int i = 0; i < lenn-lenp+1; ++i) {
-            map<char, int> tmp;
-            bool check{true};
-            for(int j = i; j < i+lenp; ++j) {
-                (tmp.find(L[j]) == tmp.end()) ? tmp[L[j]] = 1 : tmp[L[j]]+=1;
-            }
-            for(auto const &i : tmp) {
-                if(chars[i.first] != tmp[i.first]) {
-                    check = false;
-                    break;
-                }
-            }
-            if(check)
-                ++counter;
-        }
-        out << counter << endl;
-
-    }
-
-    out.close();
-    in.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/ladri.cpp b/I_anno/Programmazione_2/coding_contest/ladri.cpp
deleted file mode 100644
index 04e8e65..0000000
--- a/I_anno/Programmazione_2/coding_contest/ladri.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<vector>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(short _ = 0; _ < 100; ++_) {
-        int N, K, M;
-        in >> N >> K >> M;
-        int* path = new int[N+1];
-        int i;
-        for(i = 0; i < N; ++i)
-            in >> path[i];
-
-        path[i] = M;
-        int start = 0;
-        vector<int> values;
-        /* 1 31 33 38 62 69 93 97 98 99 */
-        /* x x     x  x   x          x       
-         * K = 30
-         */
-        for(int i = 0; i < N+1; ++i) {
-            if(path[i] - start > K) {
-                for(int j = i-1; j >= 0; --j) {
-                    if(path[i] - path[j] <= K) {
-                        values.push_back(path[j]);
-                        start = path[j];
-                        i = j;
-                        break;
-                    }
-                }
-            }
-        }
-
-        // Stampa la path corretta per debug
-        for(auto const& i: values) 
-            cout << i << ' ';
-
-        cout << endl;
-        out << values.size() << endl;
-        delete[] path;
-    }
-
-
-    out.close();
-    in.close();
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/pizzini.cpp b/I_anno/Programmazione_2/coding_contest/pizzini.cpp
deleted file mode 100644
index 4fcb4ab..0000000
--- a/I_anno/Programmazione_2/coding_contest/pizzini.cpp
+++ /dev/null
@@ -1,48 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<vector>
-
-using namespace std;
-
-void get_fib(vector<int> &v, int N) {
-    int a = v.at(0);
-    int b = v.at(1);
-    while(b <= N) {
-        a += b;
-        v.push_back(a);
-        swap(a, b);
-    }
-    v.pop_back();
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(short _ = 0; _ < 100; ++_) {
-        int N;
-        in >> N;
-        vector<int> fib {1, 2};
-        get_fib(fib, N);
-        vector<int> seq(fib.size(), 0);
-
-        int sum{};
-        for(int i = fib.size()-1; i >= 0; --i) {
-            if(fib.at(i) + sum > N) continue;
-
-            sum += fib.at(i);
-            seq[i] = 1;
-        }
-
-
-        for(auto const& i : seq)
-            out << i;
-
-        out << endl;
-    }
-
-    out.close();
-    in.close();
-    
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/scheletri.cpp b/I_anno/Programmazione_2/coding_contest/scheletri.cpp
deleted file mode 100644
index 2389d25..0000000
--- a/I_anno/Programmazione_2/coding_contest/scheletri.cpp
+++ /dev/null
@@ -1,56 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<vector>
-#include<algorithm>
-
-using namespace std;
-
-int find_i(int index, vector<int> cms) {
-    for(int i = index; i < cms.size(); ++i) {
-        if(cms.at(i) != 0)
-            return i;
-    }
-    
-    return 0;
-}
-
-int find_j(int index, vector<int> cms) {
-    for(int j = index; j < cms.size()-1; ++j) {
-        if(cms.at(j+1) == 0)
-            return j+1;
-    }
-    
-    return cms.size();
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    short N;
-    for(int __c = 0; __c < 100; ++__c) {
-        in >> N;
-        vector<int> cms;
-        int el;
-        for(short i = 0; i < N; ++i) {
-            in >> el;
-            cms.push_back(el);
-        }
-        
-        int counter{};
-        int i{}, j{};
-        while(count_if(begin(cms), end(cms), [](int num) { return num == 0; } ) != cms.size() ) {
-            i = find_i(i, cms);
-            j = find_j(i, cms);
-            for(int ii = i; ii < j; ++ii) {
-                --cms[ii];
-            }
-            ++counter;
-        }
-        out << counter << endl;
-    }
-
-    out.close();
-    in.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/stazioni.cpp b/I_anno/Programmazione_2/coding_contest/stazioni.cpp
deleted file mode 100644
index 29ede44..0000000
--- a/I_anno/Programmazione_2/coding_contest/stazioni.cpp
+++ /dev/null
@@ -1,82 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<algorithm>
-#include<vector>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 1; ++ts) {
-        int N, S;
-        in >> N >> S;
-        vector<long> st;
-        vector<vector<long>> paths;
-        vector<vector<long>> paths2;
-        vector<vector<long>> paths3;
-
-        int e;
-        for(int i = 0; i < N; ++i) {
-            in >> e;
-            st.push_back(e);
-        }
-
-        int index{};
-        for(int i = 0; i < N-S+1; ++i) {
-            for(int j = 0; j < N; ++j) {
-                paths.push_back(vector<long>{});
-                paths[index].push_back(i);
-                for(int k = j; paths[index].size() < S; ++k) {
-                    int t = (k == N) ? 0 : k;
-                    if(k > N) break;
-                    paths[index].push_back(t);
-                }
-                sort(begin(paths[index]), end(paths[index]));
-                if(paths[index].size() == S)
-                    paths2.push_back(paths[index]);
-                ++index;
-            }
-        }
-        for(int i = 0; i < paths2.size(); ++i) {
-            bool check{true};
-            if(paths2[i].size() != S) continue;
-            for(int j = 0; j < paths2[i].size()-1; ++j) {
-                if(paths2[i].at(j) == paths2[i].at(j+1)) {
-                    check = false;
-                    break;
-                }
-            }
-            if(check)
-                paths3.push_back(paths2[i]);
-        }
-
-        for(auto const& i : paths3) {
-            for(auto const& j : i) 
-                cout << st[j] << ' ';
-
-            cout << endl;
-        }
-        cout << endl;
-
-        int major{};
-        for(int i = 0; i < paths3.size(); ++i) {
-            vector<long> diffs;
-            for(int j = 0; j < paths3[i].size()-1; ++j) {
-                int p1 = st[paths3[i][j+1]];
-                int p2 = st[paths3[i][j]];
-                diffs.push_back(p1 - p2);
-            }
-            int miner = *min_element(begin(diffs), end(diffs));
-            if(miner > major)
-                major = miner;
-        }
-        cout << ts << ' ' << major << endl;
-        out << major << endl;
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/tastevin.cpp b/I_anno/Programmazione_2/coding_contest/tastevin.cpp
deleted file mode 100644
index 301ebcf..0000000
--- a/I_anno/Programmazione_2/coding_contest/tastevin.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-#include<iostream>
-#include<fstream>
-#include<vector>
-#include<algorithm>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int N;
-        in >> N;
-        vector<int> arr(N);
-        for(int i = 0; i < N; ++i) {
-            in >> arr.at(i);
-        }
-
-        vector<int> paths(N, 1);
-
-        for(int i = N-2; i >= 0; --i) {
-            int mx = 0;
-            for(int j = i+2; j < N; ++j) {
-                if(mx < paths[j] && arr[j] >= arr[i]) {
-                    mx = paths[j];
-                }
-            }
-            paths[i] += mx;
-        }
-
-        out << *max_element(begin(paths), end(paths)) << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/coding_contest/tastevin_paths.cpp b/I_anno/Programmazione_2/coding_contest/tastevin_paths.cpp
deleted file mode 100644
index eb7da54..0000000
--- a/I_anno/Programmazione_2/coding_contest/tastevin_paths.cpp
+++ /dev/null
@@ -1,67 +0,0 @@
-// It prints all possible paths
-
-#include<iostream>
-#include<fstream>
-#include<vector>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int N;
-        in >> N;
-        vector<int> arr;
-        int e;
-        for(int i = 0; i < N; ++i) {
-            in >> e;
-            arr.push_back(e);
-        }
-
-        int max_value{};
-        int value;
-
-        for(int i = 0; i < N; ++i) {
-            vector<int> tmp;
-            tmp.push_back(i);
-            value = arr[i];
-            for(int j = i+2; j < N; ++j) {
-                if(arr[j] >= value) {
-                    tmp.push_back(j);
-                    value = arr[j];
-                    ++j;
-                }
-            }
-            while(!tmp.empty()) {
-                if(tmp.size() > max_value) {
-                    for(auto const&i : tmp) {
-                        cout << i << ' ';
-                    }
-                    cout << endl;
-                    max_value = tmp.size();
-                }
-                int k = tmp.back();
-                tmp.pop_back();
-                if(tmp.size() > 0)
-                    value = arr[tmp.back()];
-                else
-                    value = arr[k];
-                for(int j = k+1; j < N; ++j) {
-                    if(arr[j] >= value) {
-                        value = arr[j];
-                        tmp.push_back(j);
-                        ++j;
-                    }
-                }
-            }
-        }
-
-        out << max_value << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/bfs.cc b/I_anno/Programmazione_2/data_structures/bfs.cc
deleted file mode 100644
index 2b4efbd..0000000
--- a/I_anno/Programmazione_2/data_structures/bfs.cc
+++ /dev/null
@@ -1,186 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<queue>
-#define W -1
-#define G 0
-#define B 1
-
-using namespace std;
-
-template<class H>
-class node {
-public:
-    explicit node(H key, node<H>* next) : _key{key}, _next(next) {}
-    const H& key() const { return _key; }
-    H& key() { return _key; }
-    const node<H>*& next() const { return _next; }
-    node<H>*& next() { return _next; }
-private:
-    H _key;
-    node<H>* _next;
-};
-
-template<class H>
-class list {
-public:
-    list() : _head{nullptr} {}
-    ~list() {
-        while(_head) {
-            auto tmp = _head;
-            _head = _head->next();
-            delete tmp;
-        }
-    }
-    list<H>* push(H val) {
-        auto iter = _head;
-        while(iter && iter->next())
-            iter = iter->next();
-
-        if(!iter)
-            _head = new node<H>{val, nullptr};
-        else
-            iter->next() = new node<H>{val, nullptr};
-
-        return this;
-    }
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->key() << ' ';
-            iter = iter->next();
-        }
-    }
-    vector<H> as_vector() {
-        vector<H> v;
-        auto iter = _head;
-        while(iter) {
-            v.push_back(iter->key());
-            iter = iter->next();
-        }
-        return v;
-    }
-    node<H>* search(H val) {
-        auto iter = _head;
-        while(iter && iter->key() != val) {
-            iter = iter->next();
-        }
-
-        return iter;
-    }
-private:
-    node<H>* _head;
-};
-
-template<class H>
-class graph {
-public:
-
-private:
-    int _len, _nodes, _edges;
-    int* _parents;
-    int* _distances;
-    H** _k; // it works like a dictionary, it saves the keys
-    list<int>** _adj;
-    int _index(H val) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == val) return i;
-
-        return -1;
-    }
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new list<int>*[_len];
-        _parents = new int[_len];
-        _distances = new int[_len];
-        for(int i = 0; i < _len; ++i) {
-            _k[i] = nullptr;
-            _adj[i] = new list<int>{};
-        }
-    }
-
-    graph<H>* add_node(H k) {
-        if(_nodes == _len) return this;
-        if(_index(k) >= 0) return this; // node is already there
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-    void bfs(int s) {
-        int colors[_len];
-        queue<int> q;
-
-        for(int i = 0; i < _nodes; ++i) {
-            colors[i] = W;
-            _parents[i] = -1;
-            _distances[i] = 999999999;
-        }
-        q.push(s);
-        colors[s] = G;
-        _distances[s] = 0;
-        while(!q.empty()) {
-            int x = q.front();
-            q.pop();
-            for(auto const& j : _adj[x]->as_vector()) {
-                if(colors[j] == W) {
-                    colors[j] = G;
-                    q.push(j);
-                    _parents[j] = x;
-                    _distances[j] = _distances[x] + 1;
-                }
-            }
-            colors[x] = B;
-        }
-
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "[" << i << "]->";
-            if(_distances[i]==999999999) cout << "inf." << endl;
-            else cout << _distances[i] << endl;
-        }
-    }
-
-    void bfs(H x) {
-        int s = _index(x);
-        if(s != -1)
-            bfs(s);
-    }
-
-    graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-
-        if(!_adj[i]->search(j)) {
-            _adj[i]->push(j);
-            _edges++;
-        }
-
-        return this;
-    }
-
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << i << ", " << *_k[i] << "): ";
-            for(auto const& j : _adj[i]->as_vector())
-                cout << "(" << j << ", " << *_k[j] << "), ";
-            cout << '\n';
-        } 
-    }
-};
-
-
-int main() {
-    graph<string>* g = new graph<string>(5);
-    g->add_node("hello")->add_node("greg")->add_node("yes");
-    g->add_node("nop")->add_node("ok");
-    g->add_edge("hello", "ok");
-    g->add_edge("ok", "yes")->add_edge("yes", "ok")->add_edge("yes", "yes");
-    g->add_edge("yes", "nop");
-    g->print();
-    g->bfs("hello");
-
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/bst.cc b/I_anno/Programmazione_2/data_structures/bst.cc
deleted file mode 100644
index 9223e04..0000000
--- a/I_anno/Programmazione_2/data_structures/bst.cc
+++ /dev/null
@@ -1,225 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<class T>
-struct node {
-    T key;
-    node<T>* prev;
-    node<T>* right;
-    node<T>* left;
-};
-
-template<class T>
-class bst {
-public:
-    bst() : root{nullptr} {}
-
-    ~bst() {
-        // TODO
-    }
-
-    bst<T>* insert(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            insert(i);
-
-        return this;
-    }
-
-    bst<T>* insert(T k) {
-        node<T>* nodus = new node<T>{k, nullptr, nullptr, nullptr};
-        node<T>* iter = root;
-        node<T>* prev = nullptr;
-
-        while(iter) {
-            prev = iter;
-            iter = (k < iter->key) ? iter->left : iter->right;
-        }
-
-        nodus->prev = prev;
-        if(!prev)
-            root = nodus;
-        else if(k < prev->key)
-            prev->left = nodus;
-        else
-            prev->right = nodus;
-
-        return this;
-    }
-
-    bst<T>* remove(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            remove(i);
-
-        return this;
-    }
-
-    bst<T>* remove(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return this;
-
-        if(!nodus->left) {
-            _transplant(nodus, nodus->right);
-        } else if(!nodus->right) {
-            _transplant(nodus, nodus->left);
-        } else {
-            node<T>* iter = _min(nodus->right);
-            if(iter->prev != nodus) {
-                _transplant(iter, iter->right);
-                iter->right = nodus->right;
-                iter->right->prev = iter;
-            }
-            _transplant(nodus, iter);
-            iter->left = nodus->left;
-            iter->left->prev = iter;
-        }
-
-        delete nodus;
-        return this;
-    }
-
-    node<T>* min() {
-        return _min(root);
-    }
-
-    node<T>* min(node<T>* nodus) {
-        return _min(nodus);
-    }
-
-    node<T>* max() {
-        return _max(root);
-    }
-
-    node<T>* max(node<T>* nodus) {
-        return _max(nodus);
-    }
-
-    node<T>* search(T k) {
-        node<T>* iter = root;
-        while(iter && iter->key != k)
-            iter = (iter->key > k) ? iter->left : iter->right;
-
-        return iter;
-    }
-
-    node<T>* successor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->right)
-            return min(nodus->right);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->right) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-
-    }
-    node<T>* predecessor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->left)
-            return max(nodus->left);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->left) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-    }
-
-    friend ostream& operator<<(ostream& os, bst<T>* tree) {
-        tree->_preorder(os, tree->root);
-        return os;
-    }
-private:
-    void _transplant(node<T>* u, node<T>* v) {
-        if(!u->prev) {
-            root = v;
-        } else if(u == u->prev->left) {
-            u->prev->left = v;
-        } else {
-            u->prev->right = v;
-        }
-
-        if(v)
-            v->prev = u->prev;
-    }
-
-    node<T>* _min(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->left)
-            iter = iter->left;
-
-        return iter;
-    }
-
-    node<T>* _max(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->right)
-            iter = iter->right;
-
-        return iter;
-    }
-
-    void _inorder(ostream& os, node<T>* root) {
-        if(root) {
-            _inorder(os, root->left);
-            os << root->key << ' ';
-            _inorder(os, root->right);
-        }
-    }
-
-    void _preorder(ostream& os, node<T>* root) {
-        if(root) {
-            os << root->key << ' ';
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-        }
-    }
-
-    void _postorder(ostream& os, node<T>* root) {
-        if(root) {
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-            os << root->key << ' ';
-        }
-    }
-    node<T>* root;
-};
-
-int main() {
-    bst<int>* b = new bst<int>{};
-
-    // b->insert(12)->insert(5)->insert(18)->insert(2)->insert(9);
-    // b->insert(15)->insert(13)->insert(17)->insert(19);
-
-    b->insert({12, 5, 18, 2, 9, 15, 13, 17, 19});
-    cout << b << endl;
-    cout << (b->search(5) != nullptr) << endl;
-    cout << (b->search(1) != nullptr) << endl;
-    cout << b->max()->key << ' ' << b->min()->key << endl;
-    for(auto const& i : {12, 9, 14, 18}) {
-        auto elem = b->successor(i);
-        if(elem)
-            cout << "(" << i << ", " << elem->key << ") ";
-    }
-    cout << endl;
-
-    for(auto const& i : {9, 2, 5, 15, 18, 12, 19}) {
-        auto elem = b->predecessor(i);
-        if(elem)
-            cout << "(" << i << ", " << elem->key << ") ";
-    }
-    cout << endl;
-    b->remove({5, 12});
-    cout << b << endl;
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/circle_double_list.cc b/I_anno/Programmazione_2/data_structures/circle_double_list.cc
deleted file mode 100644
index f162e57..0000000
--- a/I_anno/Programmazione_2/data_structures/circle_double_list.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node* prev;
-    node* next;
-};
-
-
-template<typename T>
-class list {
-public:
-    list() : _head{nullptr} {}
-
-    ~list() {
-        node<T>* iter = _head;
-        while(iter->next != _head) {
-            node<T>* tmp = iter;
-            delete tmp;
-            iter = iter->next;
-        }
-        node<T>* tmp = iter;
-        delete tmp;
-    }
-
-    list* push_front(T val) {
-        auto elem = _last();
-        if(!_head) {
-            _head = new node<T>{val, nullptr, nullptr};
-            _head->prev = _head->next = _head;
-        } else {
-            _head = new node<T>{val, elem, _head};
-            elem->next = _head->next->prev = _head;
-        }
-
-        return this;
-    }
-
-    list* push_back(T val) {
-        if(!_head) return this->push_front(val);
-
-        auto last_e = _last();
-        last_e->next = new node<T>{val, last_e, _head};
-        _head->prev = last_e->next;
-
-        return this;
-    }
-
-    list* push_after_value(T val, T newval) {
-        node<T>* iter = _search(val);
-        if(iter) {
-            node<T>* nod = new node<T>{newval, iter, iter->next};
-            iter->next = nod;
-            nod->next->prev = nod;
-        }
-
-        return this;
-    }
-
-    list* push_before_value(T val, T newval) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-
-        if(iter->value == val)
-            return this->push_front(newval);
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        node<T>* nod = new node<T>{newval, iter, iter->next};
-        iter->next = nod;
-        nod->next->prev = nod;
-
-        return this;
-    }
-
-    list* pop(int val) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        if(elem == _head) return this->pop_front();
-
-        node<T>* iter = elem->prev;
-        node<T>* temp = iter->next;
-        iter->next = iter->next->next;
-        iter->next->prev = iter;
-        delete temp;
-
-        return this;
-    }
-
-    list* pop_front() {
-        if(!_head)
-            return this;
-
-        auto last_e = _last();
-        node<T>* elem = _head;
-        _head = _head->next;
-        _head->prev = last_e;
-        last_e->next = _head;
-        delete elem;
-
-        return this;
-    }
-
-    list* pop_back() {
-        if(!_head)
-            return this;
-
-        auto last_e = _last();
-
-        if(last_e == _head) {
-            delete _head;
-            _head = nullptr;
-        } else {
-            auto iter = last_e->prev;
-            delete iter->next;
-            iter->next = _head;
-            _head->prev = iter;
-        }
-
-        return this;
-    }
-
-    void print() {
-        node<T>* iter = _head;
-        while(iter != nullptr) {
-            cout << iter->value << ' ';
-            cout << "[[ " << iter->prev->value << ", ";
-            cout << iter->next->value << " ]],  ";
-            iter = iter->next;
-            if(iter == _head) break;
-        }
-    }
-private:
-    node<T>* _last() {
-        node<T>* iter = _head;
-        while(iter && iter->next != _head) {
-            iter = iter->next;
-        }
-
-        return iter;
-    }
-
-    node<T>* _search(T val) {
-        node<T>* iter = _head;
-        if(iter->value == val) return iter;
-
-        while(iter && iter->value != val) {
-            iter = iter->next;
-            if(iter == _head) return nullptr;
-        }
-
-        return iter;
-    }
-
-    node<T>* _head;
-};
-
-int main() {
-    list<int>* l = new list<int>{};
-    l->push_front(2);
-    l->push_back(1)->push_back(3);
-    l->push_front(5)->push_front(9);
-    l->push_back(0)->push_back(6);
-    l->print(); cout << '\n';
-    l->push_after_value(7, -2);
-    l->push_before_value(9, 10);
-    l->print(); cout << '\n';
-    l->pop_front();
-    l->pop_front();
-    l->pop_back();
-    l->pop_front();
-    l->print(); cout << '\n';
-    l->pop(2);
-    l->print(); cout << '\n';
-
-    delete l;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/circle_list.cc b/I_anno/Programmazione_2/data_structures/circle_list.cc
deleted file mode 100644
index 2143ac1..0000000
--- a/I_anno/Programmazione_2/data_structures/circle_list.cc
+++ /dev/null
@@ -1,189 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node* next;
-};
-
-
-template<typename T>
-class list {
-public:
-    list() : _head{nullptr} {}
-
-    ~list() {
-        node<T>* iter = _head;
-        while(iter->next != _head) {
-            node<T>* tmp = iter;
-            delete tmp;
-            iter = iter->next;
-        }
-        node<T>* tmp = iter;
-        delete tmp;
-    }
-
-    list* push_front(T val) {
-        auto elem = _last();
-        _head = new node<T>{val, _head};
-        if(!elem)
-            elem = _head;
-
-        elem->next = _head;
-
-        return this;
-    }
-
-    list* push_back(T val) {
-        if(!_head) return this->push_front(val);
-
-        auto last_e = _last();
-        last_e->next = new node<T>{val, _head};
-
-        return this;
-    }
-
-    list* push_after_value(T val, T newval) {
-        node<T>* iter = _search(val);
-        if(iter)
-            iter->next = new node<T>{newval, iter->next};
-
-        return this;
-    }
-
-    list* push_before_value(T val, T newval) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-
-        if(iter->value == val)
-            return this->push_front(newval);
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        iter->next = new node<T>{newval, iter->next};
-
-        return this;
-    }
-
-    list* pop(int val) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-        if(iter == elem) return this->pop_front();
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        node<T>* temp = iter->next;
-        iter->next = iter->next->next;
-        delete temp;
-
-        return this;
-    }
-
-    list* pop_front() {
-        if(!_head)
-            return this;
-
-        auto last_e = _last();
-
-        if(last_e == _head) {
-            delete _head;
-            _head = nullptr;
-        } else {
-            node<T>* elem = _head;
-            _head = _head->next;
-            last_e->next = _head;
-            delete elem;
-        }
-
-        return this;
-    }
-
-    list* pop_back() {
-        if(!_head)
-            return this;
-
-        node<T>* iter = _head;
-        auto last_e = _last();
-
-        if(last_e == _head) {
-            delete iter;
-            _head = nullptr;
-        } else {
-            while(iter->next != last_e) {
-                iter = iter->next;
-            }
-
-            delete iter->next;
-            iter->next = _head;
-        }
-
-        return this;
-    }
-
-    void print() {
-        node<T>* iter = _head;
-        while(iter) {
-            cout << iter->value << ' ';
-            iter = iter->next;
-            if(iter == _head) break;
-        }
-    }
-private:
-    node<T>* _last() {
-        node<T>* iter = _head;
-        while(iter && iter->next != _head) {
-            iter = iter->next;
-        }
-
-        return iter;
-    }
-
-    node<T>* _search(T val) {
-        node<T>* iter = _head;
-        if(iter->value == val) return iter;
-
-        while(iter && iter->value != val) {
-            iter = iter->next;
-            if(iter == _head) return nullptr;
-        }
-
-        return iter;
-    }
-
-    node<T>* _head;
-};
-
-int main() {
-    list<int>* l = new list<int>{};
-    l->push_before_value(4, 1);
-    l->push_back(4);
-    l->push_back(1);
-    l->push_back(0);
-    l->push_front(2);
-    l->print(); cout << endl;
-    l->pop_back();
-    l->print(); cout << endl;
-    l->pop_front();
-    l->print(); cout << endl;
-    l->pop_back();
-    l->print(); cout << endl;
-    l->push_front(3);
-    l->print(); cout << endl;
-    l->push_after_value(4, 7);
-    l->print(); cout << endl;
-    l->push_before_value(3, 5);
-    l->print(); cout << endl;
-    l->pop(5);
-    l->print(); cout << endl;
-
-    delete l;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/dfs.cc b/I_anno/Programmazione_2/data_structures/dfs.cc
deleted file mode 100644
index 744f153..0000000
--- a/I_anno/Programmazione_2/data_structures/dfs.cc
+++ /dev/null
@@ -1,191 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<queue>
-#define W -1
-#define G 0
-#define B 1
-
-using namespace std;
-
-template<class H>
-class node {
-public:
-    explicit node(H key, node<H>* next) : _key{key}, _next(next) {}
-    const H& key() const { return _key; }
-    H& key() { return _key; }
-    const node<H>*& next() const { return _next; }
-    node<H>*& next() { return _next; }
-private:
-    H _key;
-    node<H>* _next;
-};
-
-template<class H>
-class list {
-public:
-    list() : _head{nullptr} {}
-    ~list() {
-        while(_head) {
-            auto tmp = _head;
-            _head = _head->next();
-            delete tmp;
-        }
-    }
-    list<H>* push(H val) {
-        auto iter = _head;
-        while(iter && iter->next())
-            iter = iter->next();
-
-        if(!iter)
-            _head = new node<H>{val, nullptr};
-        else
-            iter->next() = new node<H>{val, nullptr};
-
-        return this;
-    }
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->key() << ' ';
-            iter = iter->next();
-        }
-    }
-    vector<H> as_vector() {
-        vector<H> v;
-        auto iter = _head;
-        while(iter) {
-            v.push_back(iter->key());
-            iter = iter->next();
-        }
-        return v;
-    }
-    node<H>* search(H val) {
-        auto iter = _head;
-        while(iter && iter->key() != val) {
-            iter = iter->next();
-        }
-
-        return iter;
-    }
-private:
-    node<H>* _head;
-};
-
-template<class H>
-class graph {
-private:
-    int _len, _nodes, _edges;
-    int* _parents;
-    int* _radixes;
-    int* _distances;
-    int* _finishes;
-    int* _colors;
-    int _time;
-    int _current;
-    H** _k; // it works like a dictionary, it saves the keys
-    list<int>** _adj;
-    int _index(H val) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == val) return i;
-
-        return -1;
-    }
-    void _dfsvisit(int u) {
-        _colors[u] = G;
-        _distances[u] = _time++;
-        _radixes[u] = _current;
-        for(auto const& v : _adj[u]->as_vector()) {
-            if(_colors[v] == W) {
-                _parents[v] = u;
-                _dfsvisit(v);
-            }
-        }
-        _colors[u] = B;
-        _finishes[u] = _time++;
-    }
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new list<int>*[_len];
-        _parents = new int[_len];
-        _radixes = new int[_len];
-        _distances = new int[_len];
-        _finishes = new int[_len];
-        _colors = new int[_len];
-        for(int i = 0; i < _len; ++i) {
-            _k[i] = nullptr;
-            _adj[i] = new list<int>{};
-        }
-    }
-
-    graph<H>* add_node(H k) {
-        if(_nodes == _len) return this;
-        if(_index(k) >= 0) return this; // node is already there
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-
-    void dfs() {
-        _time = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-            _parents[i] = -1;
-        }
-
-        for(int i = 0; i < _nodes; ++i) {
-            if(_colors[i] == W) {
-                _current = i;
-                _dfsvisit(i);
-            }
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << *_k[i] << "(" << _distances[i]+1 << ',' << _finishes[i]+1 << ")" << endl;
-        }
-    }
-
-    graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-
-        if(!_adj[i]->search(j)) {
-            _adj[i]->push(j);
-            _edges++;
-        }
-
-        return this;
-    }
-
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << i << ", " << *_k[i] << "): ";
-            for(auto const& j : _adj[i]->as_vector())
-                cout << "(" << j << ", " << *_k[j] << "), ";
-            cout << '\n';
-        } 
-    }
-};
-
-
-int main() {
-    graph<char>* g = new graph<char>(6);
-    g->add_node('u')->add_node('v')->add_node('x')->add_node('y');
-    g->add_node('w')->add_node('z');
-    g->add_edge('u', 'v');
-    g->add_edge('u', 'x');
-    g->add_edge('x', 'v');
-    g->add_edge('y', 'x');
-    g->add_edge('v', 'y');
-    g->add_edge('w', 'y');
-    g->add_edge('w', 'z');
-    g->add_edge('z', 'z');
-
-    g->print();
-    g->dfs();
-
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/graph.cc b/I_anno/Programmazione_2/data_structures/graph.cc
deleted file mode 100644
index 12837be..0000000
--- a/I_anno/Programmazione_2/data_structures/graph.cc
+++ /dev/null
@@ -1,164 +0,0 @@
-#include<iostream>
-#include<vector>
-
-using namespace std;
-
-template<class H>
-class node {
-public:
-    explicit node(H key, node<H>* next) : _key{key}, _next(next) {}
-    const H& key() const { return _key; }
-    H& key() { return _key; }
-    const node<H>*& next() const { return _next; }
-    node<H>*& next() { return _next; }
-private:
-    H _key;
-    node<H>* _next;
-};
-
-template<class H>
-class list {
-public:
-    list() : _head{nullptr} {}
-    ~list() {
-        while(_head) {
-            auto tmp = _head;
-            _head = _head->next();
-            delete tmp;
-        }
-    }
-    list<H>* push(H val) {
-        auto iter = _head;
-        while(iter && iter->next())
-            iter = iter->next();
-
-        if(!iter)
-            _head = new node<H>{val, nullptr};
-        else
-            iter->next() = new node<H>{val, nullptr};
-
-        return this;
-    }
-    list<H>* pop(H val) {
-        auto elem = search(val);
-        if(!elem)
-            return this;
-
-        auto iter = _head;
-        // This is the case when head is the element we want to pop
-        if(iter == elem) {
-            delete _head;
-            _head = nullptr;
-            return this;
-        }
-
-        while(iter && iter->next() != elem)
-            iter = iter->next();
-
-        auto tmp = iter->next();
-        if(iter->next()->next()) { 
-            iter->next() = iter->next()->next();
-        } else { // the element we want to pop is the tail
-            iter->next() = nullptr;
-        }
-        delete tmp;
-
-        return this;
-    }
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->key() << ' ';
-            iter = iter->next();
-        }
-    }
-    vector<H> as_vector() {
-        vector<H> v;
-        auto iter = _head;
-        while(iter) {
-            v.push_back(iter->key());
-            iter = iter->next();
-        }
-        return v;
-    }
-    node<H>* search(H val) {
-        auto iter = _head;
-        while(iter && iter->key() != val) {
-            iter = iter->next();
-        }
-
-        return iter;
-    }
-private:
-    node<H>* _head;
-};
-
-template<class H>
-class graph {
-public:
-
-private:
-    int _len, _nodes, _edges;
-    H **_k;
-    list<int> **_adj;
-    int _index(H val) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == val) return i;
-
-        return -1;
-    }
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new list<int>*[_len];
-        for(int i = 0; i < _len; ++i) {
-            _k[i] = nullptr;
-            _adj[i] = new list<int>{};
-        }
-    }
-
-    graph<H>* add_node(H k) {
-        if(_nodes == _len) return this;
-        if(_index(k) >= 0) return this; // node is already there
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-    graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-
-        if(!_adj[i]->search(j)) {
-            _adj[i]->push(j);
-            _edges++;
-        }
-
-        return this;
-    }
-
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << i << ", " << *_k[i] << "): ";
-            for(auto const& j : _adj[i]->as_vector())
-                cout << "(" << j << ", " << *_k[j] << "), ";
-            cout << '\n';
-        } 
-    }
-};
-
-
-int main() {
-    graph<string>* g = new graph<string>(5);
-    g->add_node("hello")->add_node("greg")->add_node("yes");
-    g->add_node("nop")->add_node("ok");
-    g->add_edge("hello", "ok");
-    g->add_edge("ok", "yes")->add_edge("yes", "ok")->add_edge("yes", "yes");
-    g->add_edge("yes", "nop");
-    g->print();
-
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/graph_stl.cc b/I_anno/Programmazione_2/data_structures/graph_stl.cc
deleted file mode 100644
index 5381747..0000000
--- a/I_anno/Programmazione_2/data_structures/graph_stl.cc
+++ /dev/null
@@ -1,221 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<algorithm>
-#include<queue>
-#include<stack>
-#define INF 99999999
-#define W -1
-#define G 0
-#define B 1
-
-using namespace std;
-
-template<class H>
-class graph {
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new vector<int>[len];
-        _colors = new int[len];
-        _d = new int[len];
-        _f = new int[len];
-        _p = new int[len];
-
-        for(int i = 0; i < len; ++i) {
-            _k[i] = nullptr;
-        }
-    }
-    ~graph() {
-        delete[] _k;
-        delete[] _adj;
-    }
-
-    graph<H>* add_node(H x) {
-        if(_index(x) > -1) return this;
-        if(_nodes == _len) return this;
-        _k[_nodes++] = new H(x);
-
-        return this;
-    }
-    graph<H>* add_edge(H u, H v) {
-        int i = _index(u);
-        int j = _index(v);
-        if(i < 0 || j < 0) return this;
-
-        if(find(_adj[i].begin(), _adj[i].end(), j) == _adj[i].end()) {
-            _adj[i].push_back(j);
-        }
-        return this;
-    }
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): ";
-            for(auto const& j : _adj[i]) {
-                cout << "(" << *_k[j] << ", " << j << ") ";
-            }
-            cout << endl;
-        }
-    }
-    void dfsvisit(int u, bool visited[]) {
-        visited[u] = true;
-        cout << "(" << *_k[u] << ", " << u << ") ";
-        for(auto const& i : _adj[u]) {
-            if(!visited[i])
-                dfsvisit(i, visited);
-        }
-    }
-    int dfsvisit(int u) {
-        int cycle = 0;
-        _colors[u] = G;
-        _d[u] = _time++;
-
-        for(auto const& j : _adj[u]) {
-            if(_colors[j] == W)
-                cycle |= dfsvisit(j);
-        }
-
-        _colors[u] = B;
-        _stack.push(u);
-        _f[u] = _time++;
-        return cycle;
-    }
-    int dfs() {
-        int cycle = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-        }
-        _time = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            if(_colors[i] == W)
-                cycle |= dfsvisit(i);
-            else if(_colors[i] == G)
-                cycle = 1;
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): [" << _d[i] << "," << _f[i] << "]" << endl;
-        }
-        return cycle;
-    }
-
-    void top_sort() {
-        int cycle = dfs();
-        if(cycle) {
-            cout << "cyclic graph!" << endl;
-            return;
-        }
-        int* s = new int[_nodes];
-        for(int i = 0; i < _nodes; ++i) s[i] = i;
-        _sort(s, _nodes, _f);
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << s[i] << ", " << _f[s[i]] << ") ";
-        }
-
-    }
-
-    void bfs(H v) {
-        int s = _index(v);
-        if(s < 0) return;
-
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-            _d[i] = INF;
-            _p[i] = -1;
-        }
-        _colors[s] = G;
-        _d[s] = 0;
-        queue<int> q;
-        q.push(s);
-        while(!q.empty()) {
-            int u = q.front();
-            q.pop();
-            for(auto const& j : _adj[u]) {
-                if(_colors[j] == W) {
-                    _colors[j] = G;
-                    _d[j] = _d[u]+1;
-                    _p[j] = u;
-                    q.push(j);
-                }
-            }
-            _colors[u] = B;
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): [" << _d[i] << "]" << endl;
-        }
-    }
-    void ssc() {
-        dfs();
-        cout << endl << endl;
-        auto gr = _transpose();
-        bool* visited = new bool[_nodes];
-        for(int i = 0; i < _nodes; ++i)
-            visited[i] = false;
-
-        while(!_stack.empty()) {
-            int v = _stack.top();
-            _stack.pop();
-            if(!visited[v]) {
-                gr->dfsvisit(v, visited);
-                cout << endl;
-            }
-        }
-        delete[] visited;
-    }
-private:
-    graph<H>* _transpose() {
-        graph<H>* g = new graph<H>{_len};
-        for(int i = 0; i < _nodes; ++i) {
-            g->add_node(*_k[i]);
-        }
-
-        for(int i = 0; i < _nodes; ++i) {
-            for(auto const& j : _adj[i]) {
-                g->add_edge(j, i);
-            }
-        }
-
-        return g;
-    }
-    void _sort(int* d, int n, int* s) {
-        for(int i = -1; i < n; ++i) {
-            int j = i-1;
-            while(j > -1 && s[d[j+1]]>s[d[j]]) {
-                swap(d[s[j+1]], d[s[j]]);
-                --j;
-            }
-        }
-    }
-    int _index(H x) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == x) return i;
-
-        return -1;
-    }
-    stack<int> _stack;
-    H** _k;
-    vector<int>* _adj;
-    int _len, _nodes, _edges;
-    int* _colors;
-    int _time;
-    int* _d;
-    int* _f;
-    int* _p;
-};
-
-int main() {
-    graph<int>* g = new graph<int>{5};
-    for(auto const& i : {0, 1, 2, 3, 4})
-        g->add_node(i);
-    g->add_edge(1, 0);
-    g->add_edge(2, 1);
-    g->add_edge(0, 2);
-    g->add_edge(0, 3);
-    g->add_edge(3, 4);
-    //g->print();
-    cout << endl;
-    //g->top_sort();
-    g->ssc();
-    cout << endl;
-    //g->bfs(0);
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/list.cc b/I_anno/Programmazione_2/data_structures/list.cc
deleted file mode 100644
index 8ddcbf9..0000000
--- a/I_anno/Programmazione_2/data_structures/list.cc
+++ /dev/null
@@ -1,164 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node* next;
-};
-
-
-template<typename T>
-class list {
-public:
-    list() : _head{nullptr} {}
-
-    ~list() {
-        while(_head) {
-            node<T>* tmp = _head->next;
-            delete tmp;
-            _head = tmp;
-        }
-    }
-
-    list* push_front(T val) {
-        _head = new node<T>{val, _head};
-
-        return this;
-    }
-
-    list* push_back(T val) {
-        if(!_head) return this->push_front(val);
-
-        node<T>* iter = _head;
-        while(iter->next) {
-            iter = iter->next;
-        }
-        iter->next = new node<T>{val, nullptr};
-
-        return this;
-    }
-
-    list* push_after_value(T val, T newval) {
-        node<T>* iter = _search(val);
-        if(iter)
-            iter->next = new node<T>{newval, iter->next};
-
-        return this;
-    }
-
-    list* push_before_value(T val, T newval) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-
-        if(iter->value == val)
-            return this->push_front(newval);
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        iter->next = new node<T>{newval, iter->next};
-
-        return this;
-    }
-
-    list* pop(int val) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-        if(iter == elem) return this->pop_front();
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        node<T>* temp = iter->next;
-        iter->next = iter->next->next;
-        delete temp;
-
-        return this;
-    }
-
-    list* pop_front() {
-        if(!_head)
-            return this;
-
-        node<T>* elem = _head;
-        _head = _head->next;
-        delete elem;
-
-        return this;
-    }
-
-    list* pop_back() {
-        if(!_head)
-            return this;
-
-        node<T>* iter = _head;
-
-        while(iter->next && iter->next->next) {
-            iter = iter->next;
-        }
-
-        if(!iter->next) {
-            delete iter;
-            _head = nullptr;
-        } else if(iter->next->next) {
-            delete iter->next->next;
-        } else {
-            delete iter->next;
-        }
-
-        iter->next = nullptr;
-
-        return this;
-    }
-
-    void print() {
-        node<T>* iter = _head;
-        while(iter) {
-            cout << iter->value << ' ';
-            iter = iter->next;
-        }
-    }
-private:
-    node<T>* _search(T value) {
-        node<T>* iter = _head;
-        while(iter && iter->value != value)
-            iter = iter->next;
-
-        return iter;
-    }
-
-    node<T>* _head;
-};
-
-int main() {
-    list<int>* l = new list<int>{};
-    l->push_front(2)->push_front(1);
-    l->print(); cout << endl;
-    l->push_back(5);
-    l->print(); cout << endl;
-    l->push_back(10)->push_back(15);
-    l->print(); cout << endl;
-    l->push_after_value(5, 6);
-    l->print(); cout << endl;
-    l->push_before_value(5, 4);
-    l->print(); cout << endl;
-    l->push_before_value(4, 3);
-    l->print(); cout << endl;
-    l->pop_back();
-    l->print(); cout << endl;
-    l->pop_front();
-    l->print(); cout << endl;
-    l->push_front(1);
-    l->print(); cout << endl;
-    l->pop(1);
-    l->print(); cout << endl;
-
-    delete l;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/list_double.cc b/I_anno/Programmazione_2/data_structures/list_double.cc
deleted file mode 100644
index fa0af26..0000000
--- a/I_anno/Programmazione_2/data_structures/list_double.cc
+++ /dev/null
@@ -1,182 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node* prev;
-    node* next;
-};
-
-
-template<typename T>
-class list {
-public:
-    list() : _head{nullptr} {}
-
-    ~list() {
-        while(_head != nullptr) {
-            node<T>* tmp = _head->next;
-            delete tmp;
-            _head = tmp;
-        }
-    }
-
-    list* push_front(T val) {
-        if(!_head) {
-            _head = new node<T>{val, nullptr, nullptr};
-        } else {
-            _head = new node<T>{val, nullptr, _head};
-            _head->next->prev = _head;
-        }
-
-        return this;
-    }
-
-    list* push_back(T val) {
-        if(!_head) return this->push_front(val);
-
-        node<T>* iter = _head;
-        while(iter->next) {
-            iter = iter->next;
-        }
-        iter->next = new node<T>{val, iter, nullptr};
-
-        return this;
-    }
-
-    list* push_after_value(T val, T newval) {
-        node<T>* elem = _search(val);
-        if(elem) {
-            node<T>* nod = new node<T>{newval, elem, elem->next};
-            elem->next = nod;
-            nod->next->prev = nod;
-        }
-
-        return this;
-    }
-
-    list* push_before_value(T val, T newval) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        node<T>* iter = _head;
-
-        if(iter->value == val)
-            return this->push_front(newval);
-
-        while(iter->next != elem)
-            iter = iter->next;
-
-        node<T>* nod = new node<T>{newval, iter, iter->next};
-        iter->next = nod;
-        nod->next->prev = nod;
-
-        return this;
-    }
-
-    list* pop(int val) {
-        node<T>* elem = _search(val);
-        if(!elem) return this;
-
-        if(elem == _head) return this->pop_front();
-
-        node<T>* iter = elem->prev;
-        node<T>* temp = iter->next;
-        iter->next = iter->next->next;
-        iter->next->prev = iter;
-        delete temp;
-
-        return this;
-    }
-
-    list* pop_front() {
-        if(!_head)
-            return this;
-
-        node<T>* elem = _head;
-        _head = _head->next;
-        _head->prev = nullptr;
-        delete elem;
-
-        return this;
-    }
-
-    list* pop_back() {
-        if(!_head)
-            return this;
-
-        node<T>* iter = _last()->prev;
-
-        if(iter->next == nullptr) {
-            delete iter;
-            _head = nullptr;
-        } else if(iter->next->next) {
-            delete iter->next->next;
-        } else {
-            delete iter->next;
-        }
-
-        iter->next = nullptr;
-
-        return this;
-    }
-
-    void print() {
-        node<T>* iter = _head;
-        while(iter) {
-            cout << iter->value << ' ';
-            cout << "[[ " << (iter->prev!=nullptr ? iter->prev->value : -1) << ", ";
-            cout << (iter->next!=nullptr ? iter->next->value : -1) << " ]],  ";
-            iter = iter->next;
-        }
-    }
-private:
-    node<T>* _last() {
-        node<T>* iter = _head;
-        while(iter->next) {
-            iter = iter->next;
-        }
-
-        return iter;
-    }
-
-    node<T>* _search(T value) {
-        node<T>* iter = _head;
-        while(iter && iter->value != value)
-            iter = iter->next;
-
-        return iter;
-    }
-
-    node<T>* _head;
-};
-
-int main() {
-    list<int>* l = new list<int>{};
-    l->push_front(2)->push_front(1);
-    l->print(); cout << endl;
-    l->push_back(5);
-    l->print(); cout << endl;
-    l->push_back(10)->push_back(15);
-    l->print(); cout << endl;
-    l->push_after_value(5, 6);
-    l->print(); cout << endl;
-    l->push_after_value(5, 7);
-    l->print(); cout << endl;
-    l->push_before_value(5, 4);
-    l->print(); cout << endl;
-    l->push_before_value(5, 3);
-    l->print(); cout << endl;
-    l->pop_back();
-    l->print(); cout << endl;
-    l->pop_front();
-    l->print(); cout << endl;
-    l->pop(2);
-    l->print(); cout << endl;
-
-    delete l;
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/matrix-graph.cc b/I_anno/Programmazione_2/data_structures/matrix-graph.cc
deleted file mode 100644
index a644ec1..0000000
--- a/I_anno/Programmazione_2/data_structures/matrix-graph.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-#include<iostream>
-#include<list>
-
-using namespace std;
-
-template<class H>
-class matrix_graph {
-public:
-    ~matrix_graph() {
-        delete[] _m;
-        delete[] _k;
-    }
-    matrix_graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _m = new int*[len];
-        _k = new H*[len];
-        for(int i = 0; i < len; ++i) {
-            _m[i] = new int[len];
-            _k[i] = nullptr;
-            for(int j = 0; j < len; ++j)
-                _m[i][j] = 0;
-        }
-    }
-
-    matrix_graph<H>* add_node(H k) {
-        if(_len == _nodes) return this; // no more space for new nodes
-        if(_index(k) > -1) return this; // nodes already exists
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-    matrix_graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-        if(!_m[i][j]) {
-            _m[i][j] = 1;
-            _edges++;
-        }
-        return this;
-    }
-    void print() {
-        for(int i = 0; i < _len; ++i) {
-            cout << i << ' ' << *_k[i] << ": ";
-            for(int j = 0; j < _len; ++j) {
-                if(_m[i][j])
-                    cout << *_k[j] << ' ';
-            }
-            cout << '\n';
-        }
-        cout << endl;
-        for(int i = 0; i < _len; ++i) {
-            for(int j = 0; j < _len; ++j) {
-                cout << _m[i][j] << ' ';
-            }
-            cout << '\n';
-        }
-    }
-private:
-    int _len, _nodes, _edges;
-    int** _m;
-    H** _k;
-    int _index(H x) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == x) return i;
-        return -1;
-    }
-};
-
-int main() {
-    matrix_graph<string>* g = new matrix_graph<string>(5);
-    g->add_node("hello")->add_node("greg")->add_node("yes");
-    g->add_node("nop")->add_node("ok");
-    g->add_edge("hello", "ok");
-    g->add_edge("ok", "yes")->add_edge("yes", "ok")->add_edge("yes", "yes");
-    g->add_edge("yes", "nop");
-    g->print();
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/queue.cc b/I_anno/Programmazione_2/data_structures/queue.cc
deleted file mode 100644
index 8398459..0000000
--- a/I_anno/Programmazione_2/data_structures/queue.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node<T>* next;
-};
-
-template<class T>
-class queue {
-public:
-    queue() : _head{nullptr} {}
-
-    ~queue() {
-        auto iter = _head;
-        while(iter) {
-            delete iter;
-            iter = iter->next;
-        }
-    }
-
-    queue<T>* enqueue(T val) {
-
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-            _tail = _head;
-        } else {
-            _tail->next = new node<T>{val, nullptr};
-            _tail = _tail->next;
-        }
-
-        return this;
-    }
-
-    node<T>* dequeue() {
-        if(!_head) return nullptr;
-        auto iter = _head;
-        delete _head;
-        _head = iter->next;
-        return iter;
-    }
-
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->value << ' ';
-            iter = iter->next;
-        }
-        cout << endl;
-    }
-private:
-    node<T>* _head;
-    node<T>* _tail;
-};
-
-int main() {
-    queue<int>* q = new queue<int>();
-
-    q->dequeue();
-    q->enqueue(4)->enqueue(2)->enqueue(8);
-    q->print();
-    auto e = q->dequeue();
-    if(e)
-        cout << e->value << endl;
-    q->enqueue(1);
-    q->print();
-
-    delete q;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/queue_w_array.cc b/I_anno/Programmazione_2/data_structures/queue_w_array.cc
deleted file mode 100644
index fb92d68..0000000
--- a/I_anno/Programmazione_2/data_structures/queue_w_array.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<class H>
-class queue {
-public:
-    queue(int n) : _size{n}, _counter{0}, _head{0}, _tail{0} {
-        _arr = new H[n];
-    }
-    ~queue() {
-        delete _arr;
-    }
-    bool is_empty() {
-        return _counter == 0;
-    }
-    bool is_full() {
-        return _counter == _size;
-    }
-
-    queue<H>* enqueue(H x) {
-        if(!is_full()) {
-            _arr[_tail] = x;
-            if(_tail == _size-1)
-                _tail = 0;
-            else
-                ++_tail;
-            _counter++;
-        }
-
-        return this;
-    }
-    H dequeue() {
-        if(is_empty()) return -1;
-        H x = _arr[_head];
-
-        if(_head == _size-1)
-            _head = 0;
-        else
-            ++_head;
-
-        _counter--;
-        return x;
-    }
-private:
-    H* _arr;
-    int _size;
-    short _counter;
-    short _head;
-    short _tail;
-};
-
-int main() {
-    queue<int>* q = new queue<int>{4};
-    q->enqueue(5)->enqueue(13)->enqueue(3);
-    cout << q->dequeue() << '\n';
-    q->enqueue(4)->enqueue(6)->enqueue(7);
-    q->dequeue();
-    q->enqueue(7);
-
-    for(int i = 0; i < 6; ++i) {
-        cout << q->dequeue() << ' ';
-    }
-    delete q;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/stack.cc b/I_anno/Programmazione_2/data_structures/stack.cc
deleted file mode 100644
index ffff780..0000000
--- a/I_anno/Programmazione_2/data_structures/stack.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<typename T>
-struct node {
-    T value;
-    node<T>* next;
-};
-
-template<class T>
-class stack {
-public:
-    stack() : _head{nullptr} {}
-
-    ~stack() {
-        auto iter = _head;
-        while(iter) {
-            delete iter;
-            iter = iter->next;
-        }
-    }
-
-    stack<T>* push(T val) {
-
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-        } else {
-            _head = new node<T>{val, _head};
-        }
-
-        return this;
-    }
-
-    node<T>* pop() {
-        if(!_head) return nullptr;
-        node<T>* elem = _head;
-        delete _head;
-        _head = elem->next;
-
-        return elem;
-    }
-
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->value << ' ';
-            iter = iter->next;
-        }
-        cout << endl;
-    }
-private:
-    node<T>* _head;
-};
-
-int main() {
-    stack<int>* s = new stack<int>();
-
-    s->pop();
-    s->push(4)->push(2)->push(8);
-    s->print();
-    auto e = s->pop();
-    if(e)
-        cout << e->value << endl;
-    s->push(1);
-    s->print();
-
-    delete s;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/stack_w_array.cc b/I_anno/Programmazione_2/data_structures/stack_w_array.cc
deleted file mode 100644
index c20db90..0000000
--- a/I_anno/Programmazione_2/data_structures/stack_w_array.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<class H>
-class stack {
-public:
-    stack(int n) : _size{n}, _top{-1} {
-        _arr = new H[n];
-    }
-    ~stack() {
-        delete _arr;
-    }
-    bool is_empty() {
-        return _top == -1;
-    }
-    bool is_full() {
-        return _top == _size-1;
-    }
-    stack<H>* push(H x) {
-        if(!is_full()) {
-            _arr[++_top] = x;
-        }
-        return this;
-    }
-    H pop() {
-        if(is_empty()) 
-            return -1;
-        _top--;
-        return _arr[_top+1];
-    }
-private:
-    int _size;
-    H* _arr;
-    short _top;
-};
-
-int main() {
-    stack<int>* s = new stack<int>{7};
-
-    s->push(15)->push(6)->push(2)->push(9)->push(17)->push(3);
-    cout << s->pop() << '\n';
-    s->push(18)->push(19)->push(12);
-
-    for(int i = 0; i < 7; ++i)
-        cout << s->pop() << ' ';
-
-    delete s;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/data_structures/top-sort.cc b/I_anno/Programmazione_2/data_structures/top-sort.cc
deleted file mode 100644
index 7441ee9..0000000
--- a/I_anno/Programmazione_2/data_structures/top-sort.cc
+++ /dev/null
@@ -1,212 +0,0 @@
-
-#include<iostream>
-#include<vector>
-#include<queue>
-#define W -1
-#define G 0
-#define B 1
-
-using namespace std;
-
-template<class H>
-class node {
-public:
-    explicit node(H key, node<H>* next) : _key{key}, _next(next) {}
-    const H& key() const { return _key; }
-    H& key() { return _key; }
-    const node<H>*& next() const { return _next; }
-    node<H>*& next() { return _next; }
-private:
-    H _key;
-    node<H>* _next;
-};
-
-template<class H>
-class list {
-public:
-    list() : _head{nullptr} {}
-    ~list() {
-        while(_head) {
-            auto tmp = _head;
-            _head = _head->next();
-            delete tmp;
-        }
-    }
-    list<H>* push(H val) {
-        auto iter = _head;
-        while(iter && iter->next())
-            iter = iter->next();
-
-        if(!iter)
-            _head = new node<H>{val, nullptr};
-        else
-            iter->next() = new node<H>{val, nullptr};
-
-        return this;
-    }
-    void print() {
-        auto iter = _head;
-        while(iter) {
-            cout << iter->key() << ' ';
-            iter = iter->next();
-        }
-    }
-    vector<H> as_vector() {
-        vector<H> v;
-        auto iter = _head;
-        while(iter) {
-            v.push_back(iter->key());
-            iter = iter->next();
-        }
-        return v;
-    }
-    node<H>* search(H val) {
-        auto iter = _head;
-        while(iter && iter->key() != val) {
-            iter = iter->next();
-        }
-
-        return iter;
-    }
-private:
-    node<H>* _head;
-};
-
-template<class H>
-class graph {
-private:
-    int _len, _nodes, _edges;
-    int* _parents;
-    int* _radixes;
-    int* _distances;
-    int* _finishes;
-    int* _colors;
-    int _time;
-    int _current;
-    H** _k; // it works like a dictionary, it saves the keys
-    list<int>** _adj;
-    int _index(H val) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == val) return i;
-
-        return -1;
-    }
-    bool _dfsvisit(int u) {
-        bool cycle = false;
-        _colors[u] = G;
-        _distances[u] = _time++;
-        _radixes[u] = _current;
-        for(auto const& v : _adj[u]->as_vector()) {
-            if(_colors[v] == W) {
-                _parents[v] = u;
-                _dfsvisit(v);
-            } else if(_colors[v] == G) {
-                cycle = true;
-            }
-        }
-        _colors[u] = B;
-        _finishes[u] = _time++;
-        return cycle;
-    }
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new list<int>*[_len];
-        _parents = new int[_len];
-        _radixes = new int[_len];
-        _distances = new int[_len];
-        _finishes = new int[_len];
-        _colors = new int[_len];
-        for(int i = 0; i < _len; ++i) {
-            _k[i] = nullptr;
-            _adj[i] = new list<int>{};
-        }
-    }
-
-    graph<H>* add_node(H k) {
-        if(_nodes == _len) return this;
-        if(_index(k) >= 0) return this; // node is already there
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-
-    bool dfs() {
-        bool cycle = 0;
-        _time = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-            _parents[i] = -1;
-        }
-
-        for(int i = 0; i < _nodes; ++i) {
-            if(_colors[i] == W) {
-                _current = i;
-                cycle |= _dfsvisit(i);
-            }
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << *_k[i] << "(" << _distances[i]+1 << ',' << _finishes[i]+1 << ")" << endl;
-        }
-        return cycle;
-    }
-
-    void top_sort() {
-        bool cycle = dfs();
-        if(cycle) {
-            cerr << "Grafo ciclico\n";
-            return;
-        }
-        vector<int> s(_finishes, _finishes+_nodes);
-        sort(begin(s), end(s));
-        for(auto const& i : s) {
-            cout << "(" << i << ", " << _finishes[i] << ") ";
-        }
-    }
-
-    graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-
-        if(!_adj[i]->search(j)) {
-            _adj[i]->push(j);
-            _edges++;
-        }
-
-        return this;
-    }
-
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << i << ", " << *_k[i] << "): ";
-            for(auto const& j : _adj[i]->as_vector())
-                cout << "(" << j << ", " << *_k[j] << "), ";
-            cout << '\n';
-        } 
-    }
-};
-
-
-int main() {
-    graph<char>* g = new graph<char>(6);
-    g->add_node('u')->add_node('v')->add_node('x')->add_node('y');
-    g->add_node('w')->add_node('z');
-    g->add_edge('u', 'v');
-    g->add_edge('u', 'x');
-    g->add_edge('x', 'v');
-    g->add_edge('y', 'x');
-    g->add_edge('v', 'y');
-    g->add_edge('w', 'y');
-    g->add_edge('w', 'z');
-    g->add_edge('z', 'z');
-
-    g->print();
-    g->dfs();
-    g->top_sort();
-
-    delete g;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/carattere-maggiore.cc b/I_anno/Programmazione_2/exercises/carattere-maggiore.cc
deleted file mode 100644
index 2e89fcd..0000000
--- a/I_anno/Programmazione_2/exercises/carattere-maggiore.cc
+++ /dev/null
@@ -1,40 +0,0 @@
-#include<iostream>
-#include<map>
-#include<fstream>
-
-using namespace std;
-
-
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string line;
-        getline(in, line);
-        map<char, int> chs;
-        for(auto const& c : line) {
-            if(c == ' ') continue;
-            if(chs.find(c) != chs.end())
-                chs[c]++;
-            else
-                chs[c] = 1;
-        }
-        int n = 0;
-        char c = 'a';
-        for(auto const& i : chs) {
-            if(i.second >= n) {
-                if(i.first >= c) {
-                    n = i.second;
-                    c = i.first;
-                }
-            }
-        }
-        out << c << ' ' << n << endl;
-    }
-
-    out.close();
-    in.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/dequeue.cc b/I_anno/Programmazione_2/exercises/dequeue.cc
deleted file mode 100644
index 4b012c4..0000000
--- a/I_anno/Programmazione_2/exercises/dequeue.cc
+++ /dev/null
@@ -1,137 +0,0 @@
-
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-class node {
-public:
-    node(T key, node<T>* next) : _key{key}, _next{next} {}
-    node(T key) : _key{key}, _next{nullptr} {}
-    const T& key() const { return _key; }
-    T& key() { return _key; }
-    const node<T>*& next() const { return _next; }
-    node<T>*& next() { return _next; }
-private:
-    T _key;
-    node<T>* _next;
-};
-
-template<class T>
-class Coda {
-public:
-    Coda() : _head{nullptr}, _tail{nullptr} {}
-    ~Coda() {
-
-    }
-    Coda<T>* enqueue(T val) {
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-            _tail = _head;
-        } else {
-            _tail->next() = new node<T>{val, nullptr};
-            _tail = _tail->next();
-        }
-
-        return this;
-    }
-    node<T>* dequeue() {
-        if(!_head) return nullptr;
-        node<T>* elem = _head;
-        delete _head;
-        _head = elem->next();
-
-        return elem;
-    }
-
-    bool is_empty() { return _head == nullptr; }
-private:
-    node<T>* _head;
-    node<T>* _tail;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t;
-        int n;
-        in >> t;
-        switch(t.at(0)) {
-        case 'b': {
-            Coda<bool>* queue = new Coda<bool>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    queue->enqueue(s.at(1) - '0');
-                } else {
-                    queue->dequeue();
-                }
-            }
-            while(!queue->is_empty())
-                out << queue->dequeue()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'd': {
-            Coda<double>* queue = new Coda<double>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    queue->enqueue(stod(s.substr(1, s.length()-1)));
-                } else {
-                    queue->dequeue();
-                }
-            }
-            while(!queue->is_empty())
-                out << queue->dequeue()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'c': {
-            Coda<char>* queue = new Coda<char>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    queue->enqueue(s.at(1));
-                } else {
-                    queue->dequeue();
-                }
-            }
-            while(!queue->is_empty())
-                out << queue->dequeue()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'i': {
-            Coda<int>* queue = new Coda<int>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    queue->enqueue(stoi(s.substr(1, s.length()-1)));
-                } else {
-                    queue->dequeue();
-                }
-            }
-            while(!queue->is_empty())
-                out << queue->dequeue()->key() << ' ';
-            out << endl;
-            break;
-        }
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/exercises/doppioni.cc b/I_anno/Programmazione_2/exercises/doppioni.cc
deleted file mode 100644
index fdd3e88..0000000
--- a/I_anno/Programmazione_2/exercises/doppioni.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-class node {
-public:
-    node(T key, node* parent, node* right, node* left) : _key{key}, _parent{parent}, _right{right}, _left{left} {}
-    T& key() { return _key; }
-    const T& key() const { return _key; }
-    node<T>*& parent() { return _parent; }
-    const node<T>*& parent() const { return _parent; }
-    node<T>*& right() { return _right; }
-    const node<T>*& right() const { return _right; }
-    node<T>*& left() { return _left; }
-    const node<T>*& left() const { return _left; }
-private:
-    T _key;
-    node<T>* _parent;
-    node<T>* _right;
-    node<T>* _left;
-};
-
-class bst {
-public:
-    bst() : _duplicates{0}, _root{nullptr} {}
-    bst* add(int val) {
-        node<int>* iter = _root;
-        node<int>* prev = nullptr;
-        while(iter) {
-            prev = iter;
-            if(iter->key() == val) {
-                _duplicates++;
-                return this;
-            }
-
-            if(iter->key() > val)
-                iter = iter->right();
-            else
-                iter = iter->left();
-        }
-
-        node<int>* nodus = new node<int>{val, prev, nullptr, nullptr};
-        if(!prev)
-            _root = nodus;
-        else if(prev->key() > val)
-            prev->right() = nodus;
-        else
-            prev->left() = nodus;
-
-        return this;
-    }
-    const int& duplicates() const { return _duplicates; }
-private:
-    int _duplicates;
-    node<int>* _root;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-    for(int ts = 0; ts < 100; ++ts) {
-        bst* b = new bst{};
-        int n;
-        in >> n;
-        int e;
-        for(int i = 0; i < n; ++i) {
-            in >> e;
-            b->add(e);
-        }
-        out << b->duplicates() << endl;
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/estremi-uguali.cc b/I_anno/Programmazione_2/exercises/estremi-uguali.cc
deleted file mode 100644
index 63ac019..0000000
--- a/I_anno/Programmazione_2/exercises/estremi-uguali.cc
+++ /dev/null
@@ -1,32 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-int result(string s) {
-    if(s.at(0) == s.at(s.length()-1))
-        return 1;
-
-    return 0;
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int _;
-        string s;
-        int size{};
-        for(int i = 0; i < 3; ++i) {
-            in >> _ >> s;
-            size += result(s);
-        }
-        out << size << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/even-length.cc b/I_anno/Programmazione_2/exercises/even-length.cc
deleted file mode 100644
index 2d3d6a4..0000000
--- a/I_anno/Programmazione_2/exercises/even-length.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-string result(string s) {
-    if(s.length() % 2 == 0)
-        return s;
-
-    return s.substr(0, s.length()-1);
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string s;
-        in >> s;
-        out << result(s) << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/exam_08_10_14.cc b/I_anno/Programmazione_2/exercises/exam_08_10_14.cc
deleted file mode 100644
index c9c33be..0000000
--- a/I_anno/Programmazione_2/exercises/exam_08_10_14.cc
+++ /dev/null
@@ -1,202 +0,0 @@
-#include<iostream>
-
-using namespace std;
-
-template<class H> class MultiBST {
-    virtual MultiBST<H>* ins(H x) = 0;
-    virtual int multiplicity(H x) = 0;
-    virtual void inorder() = 0;
-};
-
-template<class H>
-class node {
-public:
-    node(H val) : _key{val}, _parent{nullptr}, _left{nullptr}, _right{nullptr}, _rk{1} {}
-    H& key() { return _key; }  
-    const H& key() const { return _key; }  
-    node<H>*& parent() { return _parent; }
-    const node<H>*& parent() const { return _parent; }
-    node<H>*& left() { return _left; }
-    const node<H>*& left() const { return _left; }
-    node<H>*& right() { return _right; }
-    const node<H>*& right() const { return _right; }
-    int& rk() { return _rk; }
-    const int& rk() const { return _rk; }
-private:
-    H _key;
-    node<H>* _parent;
-    node<H>* _left;
-    node<H>* _right;
-    int _rk;
-};
-
-template<class H>
-class MyMultiBST : public MultiBST<H> {
-public:
-    MyMultiBST() : _root{nullptr} {}
-    node<H>*& root() { return _root; }
-    const node<H>*& root() const { return _root; }
-    int multiplicity(H x) {
-        auto elem = _search(x);
-        if(elem)
-            return elem->rk();
-        return 0;
-    }
-    MyMultiBST<H>* ins(H x) {
-        auto iter = _search(x);
-        if(iter) {
-            iter->rk() = iter->rk()+1;
-        } else {
-            iter = _root;
-            node<H>* y{nullptr};
-
-            while(iter) {
-                y = iter;
-                if(iter->key() > x) 
-                    iter = iter->left();
-                else
-                    iter = iter->right();
-            }
-
-            node<H>* nodus = new node<H>{x};
-            nodus->parent() = y;
-            if(!y) {
-                _root = nodus;
-            } else if(y->key() > x) {
-                y->left() = nodus;
-            } else {
-                y->right() = nodus;
-            }
-        }
-
-        return this;
-    }
-    void inorder() {
-       _inorder(_root);
-    }
-    MyMultiBST<H>* del(H x) {
-        node<H>* y;
-        node<H>* z = _search(x);
-
-        if(!z) return this;
-
-        if(z->rk() > 1) {
-            z->rk() = z->rk()-1;
-        } else {
-            if(!z->left()) {
-                _transplant(z, z->right());
-            } else if(!z->right()) {
-                _transplant(z, z->left());
-            } else {
-                y = _min(z->right());
-                if(y->parent() != z) {
-                    _transplant(y, y->right());
-                    y->right() = z->right();
-                    y->right()->parent() = y;
-                }
-                _transplant(z, y);
-                y->left() = z->left();
-                y->left()->parent() = y;
-                delete z;
-            }
-        }
-
-        return this;
-    }
-    node<H>* predecessor(H x) {
-        auto iter = _search(x);
-        if(!iter) return nullptr;
-        if(iter->left())
-            return _max(iter->left());
-
-        auto y = iter->parent();
-        while(y && iter == y->left()) {
-            iter = y;
-            y = y->parent();
-        }
-
-        return y;
-    }
-    int rank(H x) {
-        auto iter = predecessor(x);
-        int sum{1};
-        while(iter) {
-            sum+=iter->rk();
-            iter = predecessor(iter->key());
-        }
-        return sum;
-    }
-private:
-    void _transplant(node<H>* u, node<H>* v) {
-        if(!u->parent()) _root = v;
-        else if(u == u->parent()->left())
-            u->parent()->left() = v;
-        else
-            u->parent()->right() = v;
-
-        if(v)
-            v->parent() = u->parent();
-    }
-    node<H>* _max(node<H>* x) {
-        if(!x) return nullptr;
-
-        auto iter = x;
-        while(iter->right()) {
-            iter = iter->right();
-        }
-
-        return iter;
-    }
-    node<H>* _min(node<H>* x) {
-        if(!x) return nullptr;
-
-        auto iter = x;
-        while(iter->left()) {
-            iter = iter->left();
-        }
-
-        return iter;
-    }
-    void _inorder(node<H>* p) {
-        if(p) {
-            _inorder(p->left());
-            for(int i = 0; i < p->rk(); ++i) {
-                cout << p->key() << ' ';
-            }
-            _inorder(p->right());
-        }
-    }
-    node<H>* _search(H val) {
-        auto iter = _root;
-        while(iter && iter->key() != val) {
-            if(iter->key() > val)
-                iter = iter->left();
-            else
-                iter = iter->right();
-        }
-
-        return iter;
-    }
-    node<H>* _root;
-};
-
-int main() {
-    MyMultiBST<int>* t = new MyMultiBST<int>{};
-
-    for(auto const& i : {10, 7, 7, 23, 30, 4, 1, 5, 9, 5, 1, 7, 1, 9})
-        t->ins(i);
-
-    t->inorder();
-    cout << '\n';
-    for(auto const& i : {5, 7, 17})
-        cout << i << ": " << t->multiplicity(i) << endl;
-
-    for(auto const& i : {7, 4, 23, 7, 7})
-        t->del(i);
-    t->inorder();
-    cout << '\n';
-    for(auto const& i: {5, 9, 30})
-        cout << t->rank(i) << ' ';
-    delete t;
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp
deleted file mode 100644
index 4f08a74..0000000
--- a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-#include<iostream>
-#include<sstream>
-#include<fstream>
-#include<vector>
-
-using namespace std;
-int insertionsort(vector<int>& a, int n) {
-    int c = 0;
-    for(int i = 1; i < n; ++i) {
-        int j = i-1;
-        int key = a[i];
-        while(j > -1 && a[j] > key) {
-            swap(a[j+1], a[j]);
-            --j;
-            c++;
-        }
-        a[j+1] = key;
-    }
-    return c;
-}
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int N;
-        in >> N;
-        int a, b;
-        vector<int> v;
-        for(int i = 0; i < N; ++i) {
-            in >> a >> b;
-            v.push_back(a+b);
-        }
-        out << insertionsort(v, v.size()) << endl;
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp
deleted file mode 100644
index aed25e4..0000000
--- a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-#include<iostream>
-#include<sstream>
-#include<fstream>
-#include<queue>
-
-using namespace std;
-using pi = tuple<int, int, vector<int>>;
-
-class comp {
-public:
-    bool operator()(const pi& lhs, const pi& rhs) const {
-        auto xl = get<0>(lhs);
-        auto yl = get<0>(rhs);
-
-        auto il = get<1>(lhs);
-        auto jl = get<1>(rhs);
-        if(xl == yl)
-            return il > jl;
-        return xl > yl;
-    }
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int R, C;
-        in >> R >> C;
-        vector<vector<int>> v;
-        priority_queue<pi, vector<pi>, comp> pq;
-        int k;
-        for(int i = 0; i < R; ++i) {
-            v.push_back(vector<int>{});
-            for(int j = 0; j < C; ++j) {
-                in >> k;
-                v[i].push_back(k);
-            }
-        }
-
-        int index = 0;
-        for(auto const& i : v) {
-            int s = 0;
-            pi qq;
-            for(auto const& j : i)
-                s += j;
-            get<0>(qq) = s;
-            get<1>(qq) = index++;
-            get<2>(qq) = i;
-            pq.push(qq);
-        }
-        while(!pq.empty()) {
-            auto q = pq.top();
-            pq.pop();
-            for(auto const& i : get<2>(q))
-                out << i << ' ';
-        }
-        out << endl;
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp
deleted file mode 100644
index 71f9c65..0000000
--- a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp
+++ /dev/null
@@ -1,284 +0,0 @@
-#include<iostream>
-#include<sstream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-struct node {
-    T key;
-    node<T>* prev;
-    node<T>* right;
-    node<T>* left;
-};
-
-template<class T>
-class bst {
-public:
-    bst() : root{nullptr} , _val{0}{}
-
-    ~bst() {
-        // TODO
-    }
-
-    bst<T>* insert(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            insert(i);
-
-        return this;
-    }
-
-    bst<T>* insert(T k) {
-        node<T>* nodus = new node<T>{k, nullptr, nullptr, nullptr};
-        node<T>* iter = root;
-        node<T>* prev = nullptr;
-
-        while(iter) {
-            prev = iter;
-            iter = (k < iter->key) ? iter->left : iter->right;
-        }
-
-        nodus->prev = prev;
-        if(!prev)
-            root = nodus;
-        else if(k < prev->key)
-            prev->left = nodus;
-        else
-            prev->right = nodus;
-
-        return this;
-    }
-
-    bst<T>* remove(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            remove(i);
-
-        return this;
-    }
-
-    bst<T>* remove(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return this;
-
-        if(!nodus->left) {
-            _transplant(nodus, nodus->right);
-        } else if(!nodus->right) {
-            _transplant(nodus, nodus->left);
-        } else {
-            node<T>* iter = _min(nodus->right);
-            if(iter->prev != nodus) {
-                _transplant(iter, iter->right);
-                iter->right = nodus->right;
-                iter->right->prev = iter;
-            }
-            _transplant(nodus, iter);
-            iter->left = nodus->left;
-            iter->left->prev = iter;
-        }
-
-        delete nodus;
-        return this;
-    }
-
-    node<T>* min() {
-        return _min(root);
-    }
-
-    node<T>* min(node<T>* nodus) {
-        return _min(nodus);
-    }
-
-    node<T>* max() {
-        return _max(root);
-    }
-
-    node<T>* max(node<T>* nodus) {
-        return _max(nodus);
-    }
-
-    node<T>* search(T k) {
-        node<T>* iter = root;
-        while(iter && iter->key != k)
-            iter = (iter->key > k) ? iter->left : iter->right;
-
-        return iter;
-    }
-
-    node<T>* successor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->right)
-            return min(nodus->right);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->right) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-
-    }
-    node<T>* predecessor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->left)
-            return max(nodus->left);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->left) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-    }
-
-    friend ostream& operator<<(ostream& os, bst<T>* tree) {
-        tree->_inorder(os, tree->root);
-        return os;
-    }
-    T sol(T k) {
-        return _max(search(k))->key;
-    }
-private:
-    int _val;
-    void _transplant(node<T>* u, node<T>* v) {
-        if(!u->prev) {
-            root = v;
-        } else if(u == u->prev->left) {
-            u->prev->left = v;
-        } else {
-            u->prev->right = v;
-        }
-
-        if(v)
-            v->prev = u->prev;
-    }
-
-    node<T>* _min(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->left)
-            iter = iter->left;
-
-        return iter;
-    }
-
-    node<T>* _max(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->right)
-            iter = iter->right;
-
-        return iter;
-    }
-
-    void _inorder(ostream& os, node<T>* root) {
-        if(root) {
-            if(root->right && root->left) {
-                _val++;
-            }
-            _inorder(os, root->left);
-            os << root->key << ' ';
-            _inorder(os, root->right);
-        }
-    }
-
-    void _preorder(ostream& os, node<T>* root) {
-        if(root) {
-            os << root->key << ' ';
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-        }
-    }
-
-    void _postorder(ostream& os, node<T>* root) {
-        if(root) {
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-            os << root->key << ' ';
-        }
-    }
-    node<T>* root;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t, comm;
-        in >> t;
-        int n;
-        switch(t.at(0)) {
-        case 'd':
-            {
-                bst<double>* b = new bst<double>{};
-                in >> n;
-                double k;
-                for(int i = 0; i < n; ++i) {
-                    in >> comm;
-                    stringstream tcomm(comm);
-                    int ex= 0;
-                    while(getline(tcomm, comm, ':')) {
-                        if(ex == 0) {
-                            if(comm == "ins")
-                                ex = 1;
-                            else
-                                ex = 2;
-                        } else {
-                            if(ex == 1)
-                                b->insert(stod(comm));
-                            else
-                                b->remove(stod(comm));
-                            ex = 0;
-                        }
-                    }
-                }
-                in >> k;
-                cout << b << endl;
-                out << b->sol(k) << endl;
- 
-                delete b;
-                break;
-            }
-        case 'i':
-            {
-                bst<int>* b = new bst<int>{};
-                in >> n;
-                int k;
-                for(int i = 0; i < n; ++i) {
-                    in >> comm;
-                    stringstream tcomm(comm);
-                    int ex= 0;
-                    while(getline(tcomm, comm, ':')) {
-                        if(ex == 0) {
-                            if(comm == "ins")
-                                ex = 1;
-                            else
-                                ex = 2;
-                        } else {
-                            if(ex == 1)
-                                b->insert(stoi(comm));
-                            else
-                                b->remove(stoi(comm));
-                            ex = 0;
-                        }
-                    }
-                }
-                in >> k;
-                cout << b << endl;
-                out << b->sol(k) << endl;
- 
-                delete b;
-                break;
-            }
-        }
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp
deleted file mode 100644
index e234363..0000000
--- a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp
+++ /dev/null
@@ -1,293 +0,0 @@
-#include<iostream>
-#include<sstream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-struct node {
-    T key;
-    node<T>* prev;
-    node<T>* right;
-    node<T>* left;
-};
-
-template<class T>
-class bst {
-public:
-    bst() : root{nullptr} , _val{0}{}
-
-    ~bst() {
-        // TODO
-    }
-
-    bst<T>* insert(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            insert(i);
-
-        return this;
-    }
-
-    bst<T>* insert(T k) {
-        node<T>* nodus = new node<T>{k, nullptr, nullptr, nullptr};
-        node<T>* iter = root;
-        node<T>* prev = nullptr;
-
-        while(iter) {
-            prev = iter;
-            iter = (k < iter->key) ? iter->left : iter->right;
-        }
-
-        nodus->prev = prev;
-        if(!prev)
-            root = nodus;
-        else if(k < prev->key)
-            prev->left = nodus;
-        else
-            prev->right = nodus;
-
-        return this;
-    }
-
-    bst<T>* remove(initializer_list<T>&& list) {
-        for(auto const& i : list)
-            remove(i);
-
-        return this;
-    }
-
-    bst<T>* remove(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return this;
-
-        if(!nodus->left) {
-            _transplant(nodus, nodus->right);
-        } else if(!nodus->right) {
-            _transplant(nodus, nodus->left);
-        } else {
-            node<T>* iter = _min(nodus->right);
-            if(iter->prev != nodus) {
-                _transplant(iter, iter->right);
-                iter->right = nodus->right;
-                iter->right->prev = iter;
-            }
-            _transplant(nodus, iter);
-            iter->left = nodus->left;
-            iter->left->prev = iter;
-        }
-
-        delete nodus;
-        return this;
-    }
-
-    node<T>* min() {
-        return _min(root);
-    }
-
-    node<T>* min(node<T>* nodus) {
-        return _min(nodus);
-    }
-
-    node<T>* max() {
-        return _max(root);
-    }
-
-    node<T>* max(node<T>* nodus) {
-        return _max(nodus);
-    }
-
-    node<T>* search(T k) {
-        node<T>* iter = root;
-        while(iter && iter->key != k)
-            iter = (iter->key > k) ? iter->left : iter->right;
-
-        return iter;
-    }
-
-    node<T>* successor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->right)
-            return min(nodus->right);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->right) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-
-    }
-    node<T>* predecessor(T k) {
-        node<T>* nodus = search(k);
-        if(!nodus) return nullptr;
-
-        if(nodus->left)
-            return max(nodus->left);
-
-        node<T>* prev = nodus->prev;
-        while(prev && nodus == prev->left) {
-            nodus = prev;
-            prev = prev->prev;
-        }
-
-        return prev;
-    }
-
-    friend ostream& operator<<(ostream& os, bst<T>* tree) {
-        tree->_inorder(os, tree->root);
-        return os;
-    }
-    T sol(T k) {
-        auto x = search(k);
-        auto m = _max(x)->key;
-        auto mnn = _min(x);
-        T mn;
-        if(mnn->right)
-            mn = _min(mnn->right)->key;
-        else
-            mn = mnn->key;
-        cout << m << ' ' << mn << endl;
-        return m - mn;
-    }
-private:
-    int _val;
-    void _transplant(node<T>* u, node<T>* v) {
-        if(!u->prev) {
-            root = v;
-        } else if(u == u->prev->left) {
-            u->prev->left = v;
-        } else {
-            u->prev->right = v;
-        }
-
-        if(v)
-            v->prev = u->prev;
-    }
-
-    node<T>* _min(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->left)
-            iter = iter->left;
-
-        return iter;
-    }
-
-    node<T>* _max(node<T>* root) {
-        node<T>* iter = root;
-        while(iter && iter->right)
-            iter = iter->right;
-
-        return iter;
-    }
-
-    void _inorder(ostream& os, node<T>* root) {
-        if(root) {
-            if(root->right && root->left) {
-                _val++;
-            }
-            _inorder(os, root->left);
-            os << root->key << ' ';
-            _inorder(os, root->right);
-        }
-    }
-
-    void _preorder(ostream& os, node<T>* root) {
-        if(root) {
-            os << root->key << ' ';
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-        }
-    }
-
-    void _postorder(ostream& os, node<T>* root) {
-        if(root) {
-            _inorder(os, root->left);
-            _inorder(os, root->right);
-            os << root->key << ' ';
-        }
-    }
-    node<T>* root;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t, comm;
-        in >> t;
-        int n;
-        switch(t.at(0)) {
-        case 'd':
-            {
-                bst<double>* b = new bst<double>{};
-                in >> n;
-                double k;
-                for(int i = 0; i < n; ++i) {
-                    in >> comm;
-                    stringstream tcomm(comm);
-                    int ex= 0;
-                    while(getline(tcomm, comm, ':')) {
-                        if(ex == 0) {
-                            if(comm == "ins")
-                                ex = 1;
-                            else
-                                ex = 2;
-                        } else {
-                            if(ex == 1)
-                                b->insert(stod(comm));
-                            else
-                                b->remove(stod(comm));
-                            ex = 0;
-                        }
-                    }
-                }
-                in >> k;
-                cout << b << endl;
-                out << b->sol(k) << endl;
- 
-                delete b;
-                break;
-            }
-        case 'i':
-            {
-                bst<int>* b = new bst<int>{};
-                in >> n;
-                int k;
-                for(int i = 0; i < n; ++i) {
-                    in >> comm;
-                    stringstream tcomm(comm);
-                    int ex= 0;
-                    while(getline(tcomm, comm, ':')) {
-                        if(ex == 0) {
-                            if(comm == "ins")
-                                ex = 1;
-                            else
-                                ex = 2;
-                        } else {
-                            if(ex == 1)
-                                b->insert(stoi(comm));
-                            else
-                                b->remove(stoi(comm));
-                            ex = 0;
-                        }
-                    }
-                }
-                in >> k;
-                cout << b << endl;
-                out << b->sol(k) << endl;
- 
-                delete b;
-                break;
-            }
-        }
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp
deleted file mode 100644
index dd8fc98..0000000
--- a/I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp
+++ /dev/null
@@ -1,285 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<algorithm>
-#include<queue>
-#include<stack>
-#include<fstream>
-#define INF 99999999
-#define W -1
-#define G 0
-#define B 1
-
-using namespace std;
-
-template<class H>
-class graph {
-public:
-    graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _k = new H*[len];
-        _adj = new vector<int>[len];
-        _colors = new int[len];
-        _d = new int[len];
-        _f = new int[len];
-        _p = new int[len];
-
-        for(int i = 0; i < len; ++i) {
-            _k[i] = nullptr;
-        }
-    }
-    ~graph() {
-        delete[] _k;
-        delete[] _adj;
-    }
-
-    graph<H>* add_node(H x) {
-        if(_index(x) > -1) return this;
-        if(_nodes == _len) return this;
-        _k[_nodes++] = new H(x);
-
-        return this;
-    }
-    graph<H>* add_edge(H u, H v) {
-        int i = _index(u);
-        int j = _index(v);
-        if(i < 0 || j < 0) return this;
-
-        if(find(_adj[i].begin(), _adj[i].end(), j) == _adj[i].end()) {
-            _adj[i].push_back(j);
-        }
-        return this;
-    }
-    void print() {
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): ";
-            for(auto const& j : _adj[i]) {
-                cout << "(" << *_k[j] << ", " << j << ") ";
-            }
-            cout << endl;
-        }
-    }
-    void dfsvisit(int u, bool visited[]) {
-        visited[u] = true;
-        cout << "(" << *_k[u] << ", " << u << ") ";
-        for(auto const& i : _adj[u]) {
-            if(!visited[i])
-                dfsvisit(i, visited);
-        }
-    }
-    int dfsvisit(int u) {
-        int cycle = 0;
-        _colors[u] = G;
-        _d[u] = _time++;
-
-        for(auto const& j : _adj[u]) {
-            if(_colors[j] == W)
-                cycle |= dfsvisit(j);
-        }
-
-        _colors[u] = B;
-        _stack.push(u);
-        _f[u] = _time++;
-        return cycle;
-    }
-    int dfs() {
-        int cycle = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-        }
-        _time = 0;
-        for(int i = 0; i < _nodes; ++i) {
-            if(_colors[i] == W)
-                cycle |= dfsvisit(i);
-            else if(_colors[i] == G)
-                cycle = 1;
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): [" << _d[i] << "," << _f[i] << "]" << endl;
-        }
-        return cycle;
-    }
-
-    void top_sort() {
-        int cycle = dfs();
-        if(cycle) {
-            cout << "cyclic graph!" << endl;
-            return;
-        }
-        int* s = new int[_nodes];
-        for(int i = 0; i < _nodes; ++i) s[i] = i;
-        _sort(s, _nodes, _f);
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << s[i] << ", " << _f[s[i]] << ") ";
-        }
-
-    }
-
-    void bfs(H v) {
-        int s = _index(v);
-        if(s < 0) return;
-
-        for(int i = 0; i < _nodes; ++i) {
-            _colors[i] = W;
-            _d[i] = INF;
-            _p[i] = -1;
-        }
-        _colors[s] = G;
-        _d[s] = 0;
-        queue<int> q;
-        q.push(s);
-        while(!q.empty()) {
-            int u = q.front();
-            q.pop();
-            for(auto const& j : _adj[u]) {
-                if(_colors[j] == W) {
-                    _colors[j] = G;
-                    _d[j] = _d[u]+1;
-                    _p[j] = u;
-                    q.push(j);
-                }
-            }
-            _colors[u] = B;
-        }
-        for(int i = 0; i < _nodes; ++i) {
-            cout << "(" << *_k[i] << ", " << i << "): [" << _d[i] << "]" << endl;
-        }
-    }
-    int ssc() {
-        dfs();
-        cout << endl << endl;
-        bool* visited = new bool[_nodes];
-        for(int i = 0; i < _nodes; ++i)
-            visited[i] = false;
-        int count = 0;
-        while(!_stack.empty()) {
-            int v = _stack.top();
-            _stack.pop();
-            if(!visited[v]) {
-                dfsvisit(v, visited);
-                count++;
-                cout << endl;
-            }
-        }
-        delete[] visited;
-        return count;
-    }
-private:
-    graph<H>* _transpose() {
-        graph<H>* g = new graph<H>{_len};
-        for(int i = 0; i < _nodes; ++i) {
-            g->add_node(*_k[i]);
-        }
-
-        for(int i = 0; i < _nodes; ++i) {
-            for(auto const& j : _adj[i]) {
-                g->add_edge(j, i);
-            }
-        }
-
-        return g;
-    }
-    void _sort(int* d, int n, int* s) {
-        for(int i = -1; i < n; ++i) {
-            int j = i-1;
-            while(j > -1 && s[d[j+1]]>s[d[j]]) {
-                swap(d[s[j+1]], d[s[j]]);
-                --j;
-            }
-        }
-    }
-    int _index(H x) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == x) return i;
-
-        return -1;
-    }
-    stack<int> _stack;
-    H** _k;
-    vector<int>* _adj;
-    int _len, _nodes, _edges;
-    int* _colors;
-    int _time;
-    int* _d;
-    int* _f;
-    int* _p;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int n, e;
-        in >> n>>e;
-        string t;
-        in >> t;
-        char _t;
-        switch(t.at(0)){
-            case 'd':{
-                graph<double>* g = new graph<double>{n};
-                double x, y;
-                for(int i = 0; i < n; ++i) {
-                    in >> x;
-                    g->add_node(x);
-                }
-                for(int i = 0; i < e; ++i) {
-                    in >>_t;
-                    in >> x >> y;
-                    in >> _t;
-                    g->add_edge(x, y);
-                    g->add_edge(y, x);
-                }
-                g->print();
-                cout << endl << endl;
-                out << g->ssc()<<endl;
-                delete g;
-                break;
-             }
-            case 'i':{
-
-                graph<int>* g = new graph<int>{n};
-                int x, y;
-                for(int i = 0; i < n; ++i) {
-                    in >> x;
-                    g->add_node(x);
-                }
-                for(int i = 0; i < e; ++i) {
-                    in >>_t;
-                    in >> x >> y;
-                    in >> _t;
-                    g->add_edge(x, y);
-                    g->add_edge(y, x);
-                }
-                g->print();
-                cout << endl << endl;
-                out << g->ssc()<<endl;
-                delete g;
-                break;
-                     }
-            case 'c': {
-
-                graph<char>* g = new graph<char>{n};
-                char x, y;
-                for(int i = 0; i < n; ++i) {
-                    in >> x;
-                    g->add_node(x);
-                }
-                for(int i = 0; i < e; ++i) {
-                    in >>_t;
-                    in >> x >> y;
-                    in >> _t;
-                    g->add_edge(x, y);
-                    g->add_edge(y, x);
-                }
-                g->print();
-                cout << endl << endl;
-                out << g->ssc()<<endl;
-                delete g;
-                break;
-                      }
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
-
diff --git a/I_anno/Programmazione_2/exercises/inizia-con.cc b/I_anno/Programmazione_2/exercises/inizia-con.cc
deleted file mode 100644
index 97f0c39..0000000
--- a/I_anno/Programmazione_2/exercises/inizia-con.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-string result(string s, char c) {
-    if(s.at(0) == c)
-        return s + ' ';
-
-    return "";
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int _;
-        string s;
-        char c;
-        in >> c;
-        for(int i = 0; i < 3; ++i) {
-            in >> _ >> s;
-            out << result(s, c);
-        }
-        out << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/inserimento-coda.cc b/I_anno/Programmazione_2/exercises/inserimento-coda.cc
deleted file mode 100644
index 6775ca2..0000000
--- a/I_anno/Programmazione_2/exercises/inserimento-coda.cc
+++ /dev/null
@@ -1,119 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-class node {
-public:
-    node(T key, node<T>* next) : _key{key}, _next{next} {}
-    node(T key) : _key{key}, _next{nullptr} {}
-    const T& key() const { return _key; }
-    T& key() { return _key; }
-    const node<T>*& next() const { return _next; }
-    node<T>*& next() { return _next; }
-private:
-    T _key;
-    node<T>* _next;
-};
-
-template<class T>
-class Coda {
-public:
-    Coda() : _head{nullptr}, _tail{nullptr} {}
-    ~Coda() {
-
-    }
-    Coda<T>* enqueue(T val) {
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-            _tail = _head;
-        } else {
-            _tail->next() = new node<T>{val, nullptr};
-            _tail = _tail->next();
-        }
-
-        return this;
-    }
-    node<T>* pop() {
-        if(!_head) return nullptr;
-        node<T>* elem = _head;
-        delete _head;
-        _head = elem->next();
-
-        return elem;
-    }
-
-    bool is_empty() { return _head == nullptr; }
-private:
-    node<T>* _head;
-    node<T>* _tail;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t;
-        int n;
-        in >> t;
-        switch(t.at(0)) {
-        case 'b': {
-            Coda<bool>* queue = new Coda<bool>{};
-            in >> n;
-            bool e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                queue->enqueue(e);
-            }
-            while(!queue->is_empty())
-                out << queue->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'd': {
-            Coda<double>* queue = new Coda<double>{};
-            in >> n;
-            double e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                queue->enqueue(e);
-            }
-            while(!queue->is_empty())
-                out << queue->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'c': {
-            Coda<char>* queue = new Coda<char>{};
-            in >> n;
-            char e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                queue->enqueue(e);
-            }
-            while(!queue->is_empty())
-                out << queue->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'i': {
-            Coda<int>* queue = new Coda<int>{};
-            in >> n;
-            int e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                queue->enqueue(e);
-            }
-            while(!queue->is_empty())
-                out << queue->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/inserimento-pila.cc b/I_anno/Programmazione_2/exercises/inserimento-pila.cc
deleted file mode 100644
index 0dbe99b..0000000
--- a/I_anno/Programmazione_2/exercises/inserimento-pila.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-class node {
-public:
-    node(T key, node<T>* next) : _key{key}, _next{next} {}
-    node(T key) : _key{key}, _next{nullptr} {}
-    const T& key() const { return _key; }
-    T& key() { return _key; }
-    const node<T>*& next() const { return _next; }
-    node<T>*& next() { return _next; }
-private:
-    T _key;
-    node<T>* _next;
-};
-
-template<class T>
-class Pila {
-public:
-    Pila() : _head{nullptr}{}
-    ~Pila() {
-
-    }
-    Pila<T>* push(T val) {
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-        } else {
-            _head = new node<T>{val, _head};
-        }
-
-        return this;
-    }
-    node<T>* pop() {
-        if(!_head) return nullptr;
-        node<T>* elem = _head;
-        delete _head;
-        _head = elem->next();
-
-        return elem;
-    }
-
-    bool is_empty() { return _head == nullptr; }
-private:
-    node<T>* _head;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t;
-        int n;
-        in >> t;
-        switch(t.at(0)) {
-        case 'b': {
-            Pila<bool>* stack = new Pila<bool>{};
-            in >> n;
-            bool e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                stack->push(e);
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'd': {
-            Pila<double>* stack = new Pila<double>{};
-            in >> n;
-            double e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                stack->push(e);
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'c': {
-            Pila<char>* stack = new Pila<char>{};
-            in >> n;
-            char e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                stack->push(e);
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'i': {
-            Pila<int>* stack = new Pila<int>{};
-            in >> n;
-            int e;
-            for(int i = 0; i < n; ++i) {
-                in >> e;
-                stack->push(e);
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/matrice-adj.cc b/I_anno/Programmazione_2/exercises/matrice-adj.cc
deleted file mode 100644
index 7830f97..0000000
--- a/I_anno/Programmazione_2/exercises/matrice-adj.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-#include<iostream>
-#include<vector>
-#include<fstream>
-#include<sstream>
-
-using namespace std;
-
-template<class H>
-class matrix_graph {
-public:
-    ~matrix_graph() {
-        delete[] _m;
-        delete[] _k;
-    }
-    matrix_graph(int len) : _len{len}, _nodes{0}, _edges{0} {
-        _m = new int*[len];
-        _k = new H*[len];
-        for(int i = 0; i < len; ++i) {
-            _m[i] = new int[len];
-            _k[i] = nullptr;
-            for(int j = 0; j < len; ++j)
-                _m[i][j] = 0;
-        }
-    }
-
-    matrix_graph<H>* add_node(H k) {
-        if(_len == _nodes) return this; // no more space for new nodes
-        if(_index(k) > -1) return this; // nodes already exists
-
-        _k[_nodes++] = new H(k);
-
-        return this;
-    }
-
-    matrix_graph<H>* add_edge(H x, H y) {
-        int i = _index(x);
-        int j = _index(y);
-        if(i < 0 || j < 0) return this;
-        if(!_m[i][j]) {
-            _m[i][j] = 1;
-            _edges++;
-        }
-        return this;
-    }
-    vector<vector<H>> print() {
-        vector<vector<H>> v;
-        for(int i = 0; i < _len; ++i) {
-            v.push_back(vector<H>{*_k[i]});
-            vector<H> temp;
-            for(int j = 0; j < _len; ++j) {
-                if(_m[i][j]) {
-                    temp.push_back(*_k[j]);
-                }
-            }
-            sort(begin(temp), end(temp));
-            for(auto const& j : temp)
-                v[i].push_back(j);
-        }
-
-        sort(begin(v), end(v));
-        return v;
-    }
-private:
-    int _len, _nodes, _edges;
-    int** _m;
-    H** _k;
-    int _index(H x) {
-        for(int i = 0; i < _nodes; ++i)
-            if(*_k[i] == x) return i;
-        return -1;
-    }
-};
-
-template<class H>
-string result(vector<vector<H>> v) {
-    string s{""};
-    ostringstream ss;
-    for(auto const& i : v) {
-        s += "(";
-        for(auto const& j : i) {
-            ss << j;
-            s+= ss.str();
-            s+= ' ';
-            ss.str(""); ss.clear();
-        }
-        s.pop_back();
-        s += ") ";
-    }
-    return s;
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-    for(int ts = 0; ts < 100; ++ts) {
-        int n, m;
-        in >> n >> m;
-        string t;
-        in >> t;
-        if(t == "int") {
-            matrix_graph<int>* g = new matrix_graph<int>(n);
-            int x,y;
-            for(int i = 0; i < n; ++i) {
-               in >> x;
-               g->add_node(x);
-            }
-            char ex;
-            for(int i = 0; i < m; ++i) {
-                in >> ex >> x >> y >> ex;
-                g->add_edge(x, y);
-            }
-            auto v = g->print();
-            out << result(v) << endl;
-            delete g;
-        } else if(t == "double") {
-            matrix_graph<double>* g = new matrix_graph<double>(n);
-            double x,y;
-            for(int i = 0; i < n; ++i) {
-               in >> x;
-               g->add_node(x);
-            }
-            char ex;
-            for(int i = 0; i < m; ++i) {
-                in >> ex >> x >> y >> ex;
-                g->add_edge(x, y);
-            }
-            auto v = g->print();
-            out << result(v) << endl;
-            delete g;
-        } else {
-            matrix_graph<char>* g = new matrix_graph<char>(n);
-            char x,y;
-            for(int i = 0; i < n; ++i) {
-               in >> x;
-               g->add_node(x);
-            }
-            char ex;
-            for(int i = 0; i < m; ++i) {
-                in >> ex >> x >> y >> ex;
-                g->add_edge(x, y);
-            }
-
-            auto v = g->print();
-            out << result(v) << endl;
-            delete g;
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/minore.cc b/I_anno/Programmazione_2/exercises/minore.cc
deleted file mode 100644
index 677da76..0000000
--- a/I_anno/Programmazione_2/exercises/minore.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string s;
-        in >> s;
-        int minor = stoi(s);
-        for(in >> s; s != "STOP"; in >> s) {
-            int si = stoi(s);
-            if(si < minor)
-                minor = si;
-        }
-
-        out << minor << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/pop-stack.cc b/I_anno/Programmazione_2/exercises/pop-stack.cc
deleted file mode 100644
index 3739450..0000000
--- a/I_anno/Programmazione_2/exercises/pop-stack.cc
+++ /dev/null
@@ -1,132 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-template<class T>
-class node {
-public:
-    node(T key, node<T>* next) : _key{key}, _next{next} {}
-    node(T key) : _key{key}, _next{nullptr} {}
-    const T& key() const { return _key; }
-    T& key() { return _key; }
-    const node<T>*& next() const { return _next; }
-    node<T>*& next() { return _next; }
-private:
-    T _key;
-    node<T>* _next;
-};
-
-template<class T>
-class Pila {
-public:
-    Pila() : _head{nullptr}{}
-    ~Pila() {
-
-    }
-    Pila<T>* push(T val) {
-        if(!_head) {
-            _head = new node<T>{val, nullptr};
-        } else {
-            _head = new node<T>{val, _head};
-        }
-
-        return this;
-    }
-    node<T>* pop() {
-        if(!_head) return nullptr;
-        node<T>* elem = _head;
-        delete _head;
-        _head = elem->next();
-
-        return elem;
-    }
-
-    bool is_empty() { return _head == nullptr; }
-private:
-    node<T>* _head;
-};
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string t;
-        int n;
-        in >> t;
-        switch(t.at(0)) {
-        case 'b': {
-            Pila<bool>* stack = new Pila<bool>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    stack->push(s.at(1) - '0');
-                } else {
-                    stack->pop();
-                }
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'd': {
-            Pila<double>* stack = new Pila<double>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    stack->push(stod(s.substr(1, s.length()-1)));
-                } else {
-                    stack->pop();
-                }
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'c': {
-            Pila<char>* stack = new Pila<char>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    stack->push(s.at(1));
-                } else {
-                    stack->pop();
-                }
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        case 'i': {
-            Pila<int>* stack = new Pila<int>{};
-            in >> n;
-            string s;
-            for(int i = 0; i < n; ++i) {
-                in >> s;
-                if(s.at(0) == 'i') {
-                    stack->push(stoi(s.substr(1, s.length()-1)));
-                } else {
-                    stack->pop();
-                }
-            }
-            while(!stack->is_empty())
-                out << stack->pop()->key() << ' ';
-            out << endl;
-            break;
-        }
-        }
-    }
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/prima-maiuscola.cc b/I_anno/Programmazione_2/exercises/prima-maiuscola.cc
deleted file mode 100644
index 6273219..0000000
--- a/I_anno/Programmazione_2/exercises/prima-maiuscola.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-string result(string s) {
-    s.at(0) = toupper(s.at(0));
-
-    return s;
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int _;
-        string s;
-        for(int i = 0; i < 3; ++i) {
-            in >> _ >> s;
-            out << result(s) << ' ';
-        }
-        out << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/ripetute.cc b/I_anno/Programmazione_2/exercises/ripetute.cc
deleted file mode 100644
index 23d151a..0000000
--- a/I_anno/Programmazione_2/exercises/ripetute.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string s;
-        in >> s;
-        out << s+s << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/sol-ripetute.cc b/I_anno/Programmazione_2/exercises/sol-ripetute.cc
deleted file mode 100644
index 1518d76..0000000
--- a/I_anno/Programmazione_2/exercises/sol-ripetute.cc
+++ /dev/null
@@ -1,25 +0,0 @@
-#include<iostream>
-#include<string>
-#include<fstream>
-
-using namespace std;
-
-string result(string s) {
-    int half = s.length()/2;
-    return s.substr(0, half);
-}
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        string s;
-        in >> s;
-        out << result(s) << '\n';
-    }
-
-    in.close();
-    out.close();
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/sottosequenza.cc b/I_anno/Programmazione_2/exercises/sottosequenza.cc
deleted file mode 100644
index 1d7c481..0000000
--- a/I_anno/Programmazione_2/exercises/sottosequenza.cc
+++ /dev/null
@@ -1,26 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int n; string s;
-        in >> n >> s;
-        string tm;
-        for(int i = 0; i < n; ++i) {
-            in >> tm;
-            if(tm.find(s) != string::npos)
-                out << tm << ' ';
-        }
-        out << '\n';
-    }
-
-    in.close();
-    out.close();
-
-    return 0;
-}
diff --git a/I_anno/Programmazione_2/exercises/stringa-inversa.cc b/I_anno/Programmazione_2/exercises/stringa-inversa.cc
deleted file mode 100644
index 5c37718..0000000
--- a/I_anno/Programmazione_2/exercises/stringa-inversa.cc
+++ /dev/null
@@ -1,26 +0,0 @@
-#include<iostream>
-#include<fstream>
-
-using namespace std;
-
-int main() {
-    ifstream in("input.txt");
-    ofstream out("output.txt");
-
-    for(int ts = 0; ts < 100; ++ts) {
-        int n;
-        in >> n;
-        for(int i = 0; i < 3; ++i) {
-            string s;
-            in >> s;
-            for(int j = s.length()-1; j > -1; --j) {
-                out << s.at(j);
-            }
-            out << ' ';
-        }
-        out << endl;
-    }
-
-    out.close();
-    in.close();
-}