From f279107065146a4940f5e73602a1c3c09e58b31d 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

---
 .../Programmazione_2/data_structures/graph_stl.cc  | 221 ---------------------
 1 file changed, 221 deletions(-)
 delete mode 100644 I_anno/Programmazione_2/data_structures/graph_stl.cc

(limited to 'I_anno/Programmazione_2/data_structures/graph_stl.cc')

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;
-}
-- 
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