using System;
using System.Collections.Generic;
class Graph {
public Dictionary<int, List<int>> adjacencyList;
static void Main() {
Console.WriteLine("Hello World!");
Graph g = new Graph();
g.AddVertex(0);
g.AddVertex(1);
g.AddVertex(2);
g.AddVertex(3);
g.AddVertex(4);
g.AddVertex(5);
g.AddVertex(6);
g.AddEdge(0, 1);
g.AddEdge(0, 2);
g.AddEdge(1, 2);
g.AddEdge(1, 3);
g.AddEdge(2, 4);
g.AddEdge(3, 4);
g.AddEdge(4, 5);
g.AddEdge(5, 6);
Console.WriteLine(g.ToString());
}
public Graph() {
this.adjacencyList = new Dictionary<int, List<int>>();
}
public void AddVertex(int vertex) {
this.adjacencyList[vertex] = new List<int>();
}
public void AddEdge(int vertex1, int vertex2) {
this.adjacencyList[vertex1].Add(vertex2);
this.adjacencyList[vertex2].Add(vertex1);
}
public string ToString() {
string s = "Graph Adjacency List:\n";
foreach (KeyValuePair<int, List<int>> entry in this.adjacencyList) {
s += "" + entry.Key + ":";
foreach (int v in entry.Value) {
s += " " + v;
}
s += "\n";
}
return s;
}
}
