using System;

public class Program

{

    public static void Main()

    {int[,] a = new int[5,5];

        for(int i = 0;i<5;i++){

        for(int k = 0;k<5;k++){

            if(i-1<0|k-1<0){a[i,k]=1;}else{

            a[i,k]=a[i,k-1]+a[i-1,k];}}}

        for (int i = 0; i < 5; ++i)

 {

 for (int j = 0; j < 5; ++j)

 Console.Write(" " + a[i, j]);

 Console.WriteLine();

 }

​

    }

}