From 6c6328375c55683645146909b7ab760d0de0d463 Mon Sep 17 00:00:00 2001
From: Santo Cariotti <dcariotti24@gmail.com>
Date: Sun, 18 Oct 2020 18:56:43 +0200
Subject: chore: name of first year folder

---
 .../exercises/carattere-maggiore.cc                |  40 ---
 I_anno/Programmazione_2/exercises/dequeue.cc       | 137 ----------
 I_anno/Programmazione_2/exercises/doppioni.cc      |  77 ------
 .../Programmazione_2/exercises/estremi-uguali.cc   |  32 ---
 I_anno/Programmazione_2/exercises/even-length.cc   |  27 --
 I_anno/Programmazione_2/exercises/exam_08_10_14.cc | 202 --------------
 .../exercises/exam_20_07_20/ex1.cpp                |  39 ---
 .../exercises/exam_20_07_20/ex2.cpp                |  63 -----
 .../exercises/exam_20_07_20/ex3.cpp                | 284 --------------------
 .../exercises/exam_20_07_20/ex4.cpp                | 293 ---------------------
 .../exercises/exam_20_07_20/ex5.cpp                | 285 --------------------
 I_anno/Programmazione_2/exercises/inizia-con.cc    |  33 ---
 .../Programmazione_2/exercises/inserimento-coda.cc | 119 ---------
 .../Programmazione_2/exercises/inserimento-pila.cc | 116 --------
 I_anno/Programmazione_2/exercises/matrice-adj.cc   | 151 -----------
 I_anno/Programmazione_2/exercises/minore.cc        |  27 --
 I_anno/Programmazione_2/exercises/pop-stack.cc     | 132 ----------
 .../Programmazione_2/exercises/prima-maiuscola.cc  |  30 ---
 I_anno/Programmazione_2/exercises/ripetute.cc      |  20 --
 I_anno/Programmazione_2/exercises/sol-ripetute.cc  |  25 --
 I_anno/Programmazione_2/exercises/sottosequenza.cc |  26 --
 .../Programmazione_2/exercises/stringa-inversa.cc  |  26 --
 22 files changed, 2184 deletions(-)
 delete mode 100644 I_anno/Programmazione_2/exercises/carattere-maggiore.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/dequeue.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/doppioni.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/estremi-uguali.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/even-length.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_08_10_14.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp
 delete mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp
 delete mode 100644 I_anno/Programmazione_2/exercises/inizia-con.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/inserimento-coda.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/inserimento-pila.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/matrice-adj.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/minore.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/pop-stack.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/prima-maiuscola.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/ripetute.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/sol-ripetute.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/sottosequenza.cc
 delete mode 100644 I_anno/Programmazione_2/exercises/stringa-inversa.cc

(limited to 'I_anno/Programmazione_2/exercises')

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();
-}
-- 
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