using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int [,]a=new int [2,2];

        a[0,0]=10;

        a[0,1]=20;

        a[1,0]=30;

        a[1,1]=40;

        foreach(int i in a)

        {

            Console.WriteLine(i);

        }

        for(int v=0;v<a.GetLength(0);v++)

        {

        for(int y =0;y<a.GetLength(1);y++)

        {

            Console.Write(a[v,y]);

    }

}}}