From 4a25a5f48dde2edc01881344f56d3be6e57eb831 Mon Sep 17 00:00:00 2001
From: Guilherme Werner <guilherme.werner@tribufu.com>
Date: Sat, 10 Jun 2023 15:35:35 -0300
Subject: [PATCH] Clone graphs code

---
 .gitignore       |  2 +
 Build.ps1        |  3 ++
 Build.sh         |  3 ++
 Source/Graph.cpp | 98 ++++++++++++++++++++++++++++++++++++++++++++++++
 Source/Graph.h   | 44 ++++++++++++++++++++++
 Source/Main.cpp  | 28 ++++++++++++++
 6 files changed, 178 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Build.ps1
 create mode 100644 Build.sh
 create mode 100644 Source/Graph.cpp
 create mode 100644 Source/Graph.h
 create mode 100644 Source/Main.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..884d390
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.vscode/
+Binaries/
diff --git a/Build.ps1 b/Build.ps1
new file mode 100644
index 0000000..42971ba
--- /dev/null
+++ b/Build.ps1
@@ -0,0 +1,3 @@
+#!/usr/bin/pwsh
+
+g++ Source/Main.cpp -o Binaries/Main.exe Source/Graph.cpp && ./Binaries/Main.exe
diff --git a/Build.sh b/Build.sh
new file mode 100644
index 0000000..b92f559
--- /dev/null
+++ b/Build.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/bash
+
+g++ Source/Main.cpp -o Binaries/Main Source/Graph.cpp && ./Binaries/Main
diff --git a/Source/Graph.cpp b/Source/Graph.cpp
new file mode 100644
index 0000000..e38af86
--- /dev/null
+++ b/Source/Graph.cpp
@@ -0,0 +1,98 @@
+#include "Graph.h"
+
+void Graph::Insert(int u, int v)
+{
+    InsertD(u, v);
+    InsertD(v, u);
+}
+
+void Graph::InsertD(int u, int v)
+{
+    adj[u].push_back(v);
+}
+
+void Graph::Remove(int u, int v)
+{
+    RemoveD(u, v);
+    RemoveD(v, u);
+}
+
+void Graph::RemoveD(int u, int v)
+{
+    auto iv = find(adj[u].begin(), adj[u].end(), v);
+    *iv = -1;
+}
+
+Graph *Graph::Clone()
+{
+    Graph *graph = new Graph(length);
+
+    for (int i = 0; i < length; i++)
+    {
+        for (auto j = adj[i].begin(); j != adj[i].end(); j++)
+        {
+            graph->InsertD(i, *j);
+        }
+    }
+
+    return graph;
+}
+
+void Graph::DFS(int u, vector<int> &disc, vector<int> &low, vector<int> &parent, vector<pair<int, int>> &bridge)
+{
+    static int time = 0;
+    disc[u] = low[u] = time;
+    time += 1;
+
+    for (int v : adj[u])
+    {
+        // vertice não visitado
+        if (disc[v] == -1)
+        {
+            parent[v] = u;
+            DFS(v, disc, low, parent, bridge);
+            low[u] = min(low[u], low[v]);
+
+            if (low[v] > disc[u])
+            {
+                bridge.push_back({u, v});
+            }
+        }
+        else if (v != parent[u])
+        {
+            low[u] = min(low[u], disc[v]);
+        }
+    }
+}
+
+int Graph::DFSCount(int v, bool visited[])
+{
+    // marcar vertice como visitado
+    visited[v] = true;
+    int count = 1;
+
+    for (auto i = adj[v].begin(); i != adj[v].end(); ++i)
+    {
+        if (*i != -1 && !visited[*i])
+        {
+            count += DFSCount(*i, visited);
+        }
+    }
+
+    return count;
+}
+
+void Graph::Print()
+{
+    for (int i = 0; i < length; i++)
+    {
+        cout << "[" << i << "]: ";
+
+        for (auto j = adj[i].begin(); j != adj[i].end(); j++)
+        {
+            cout << *j << " ";
+        }
+
+        cout << endl;
+    }
+}
diff --git a/Source/Graph.h b/Source/Graph.h
new file mode 100644
index 0000000..ada85ca
--- /dev/null
+++ b/Source/Graph.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <algorithm>
+#include <bits/stdc++.h>
+#include <cstdlib>
+#include <ctime>
+#include <iostream>
+#include <list>
+#include <sstream>
+#include <string.h>
+#include <thread>
+
+using namespace std;
+
+class Graph
+{
+private:
+    int length;
+    list<int> *adj;
+
+public:
+    Graph(int length)
+    {
+        this->length = length;
+        this->adj = new list<int>[length];
+    }
+
+    ~Graph()
+    {
+        delete[] adj;
+    }
+
+public:
+    void Print();
+    void Insert(int u, int v);
+    void InsertD(int u, int v);
+    void Remove(int u, int v);
+    void RemoveD(int u, int v);
+    Graph *Clone();
+
+private:
+    void DFS(int u, vector<int> &disc, vector<int> &low, vector<int> &parent, vector<pair<int, int>> &bridge);
+    int DFSCount(int v, bool visited[]);
+};
diff --git a/Source/Main.cpp b/Source/Main.cpp
new file mode 100644
index 0000000..08d94a1
--- /dev/null
+++ b/Source/Main.cpp
@@ -0,0 +1,28 @@
+#include "Graph.h"
+
+int main()
+{
+    int length = 9;
+    Graph *g1 = new Graph(length);
+
+    g1->Insert(0, 1);
+    g1->Insert(0, 3);
+    g1->Insert(0, 4);
+    g1->Insert(1, 2);
+    g1->Insert(1, 3);
+    g1->Insert(1, 4);
+    g1->Insert(2, 3);
+    g1->Insert(2, 4);
+    g1->Insert(2, 5);
+    g1->Insert(3, 5);
+    g1->Insert(4, 5);
+    g1->Insert(5, 6);
+    g1->Insert(6, 7);
+    g1->Insert(6, 8);
+    g1->Insert(7, 8);
+
+    cout << "-- GRAFO --\n\n";
+    g1->Print();
+
+    return 0;
+}