22 - I

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;


public class Graph
{
    private int[][] g;
    private int size;
    public Graph(int size)
    {
        this.size = size;
        g = new int[size][];
        for (int i = 0; i < size; ++i)
            g[i] = new int[size];

    }

    public Graph(int[][] G)
    {
        size = G.Length;
        g = new int[size][];
        for (int i = 0; i < size; ++i)
            g[i] = new int[size];

        for (int i = 0; i < size; ++i)
            for (int j = 0; j < size; ++j)
                g[i][j] = G[i][j];
    }

    public Graph() { }

    public void Add(int v, int to)
    {
        v--; to--;
        g[v][to] = 1;
    }
    public void Remove(int v, int to)
    {
        v--; to--;
        g[v][to] = 0;
    }

    public void Print()
    {
        for (int i = 0; i < size; ++i)
        {
            for (int j = 0; j < size; ++j)
                Console.Write(g[i][j] + " ");
            Console.WriteLine();
        }
    }

    public void Clear()
    {
        for (int i = 0; i < size; ++i)
            for (int j = 0; j < size; ++j)
                g[i][j] = 0;
    }

}


class Program
{
    static void Main(string[] args)
    {
        int n = 5;
        Graph gr = new Graph(n);
        gr.Add(1, 3);
        gr.Add(1, 5);
        gr.Add(1, 1);
        gr.Add(1, 2);
        gr.Add(1, 4);
        gr.Add(2, 3);
        gr.Add(4, 3);
        gr.Add(5, 3);
        gr.Add(5, 1);
        gr.Add(3, 1);
        gr.Add(2, 5);
        gr.Add(1, 4);
        gr.Add(4, 3);
        gr.Add(4, 2);
        gr.Add(5, 5);
        gr.Add(3, 5);
        gr.Print();
        Console.WriteLine("============================================");
        int a = 2;
        int b = 3;
        gr.Remove(a, b);
        gr.Print();
        int[][] m = new int[3][];
        m[0] = new int[] { 0, 0, 1 };
        m[1] = new int[] { 1, 0, 1 };
        m[2] = new int[] { 0, 1, 1 };
        gr = new Graph(m);
        Console.WriteLine("============================================");
        gr.Remove(a, b);
        gr.Print();

    }

}