From e06d662de2a01673ce6151ef66d2aa00b271a44c Mon Sep 17 00:00:00 2001
From: Santo Cariotti <dcariotti24@gmail.com>
Date: Mon, 20 Jul 2020 12:26:37 +0200
Subject: feat: add exercises of 20/07/2020 exam

---
 .../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 ++++++++++++++++++++
 5 files changed, 964 insertions(+)
 create mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp
 create mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp
 create mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp
 create mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp
 create mode 100644 I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp

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
new file mode 100644
index 0000000..4f08a74
--- /dev/null
+++ b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex1.cpp
@@ -0,0 +1,39 @@
+#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
new file mode 100644
index 0000000..aed25e4
--- /dev/null
+++ b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex2.cpp
@@ -0,0 +1,63 @@
+#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
new file mode 100644
index 0000000..71f9c65
--- /dev/null
+++ b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex3.cpp
@@ -0,0 +1,284 @@
+#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
new file mode 100644
index 0000000..e234363
--- /dev/null
+++ b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex4.cpp
@@ -0,0 +1,293 @@
+#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
new file mode 100644
index 0000000..dd8fc98
--- /dev/null
+++ b/I_anno/Programmazione_2/exercises/exam_20_07_20/ex5.cpp
@@ -0,0 +1,285 @@
+#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;
+}
+
-- 
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