using System;
public class Exercise27
{
    public static void Main()
    {
        int i,j,n;
        int[,] arr1 = new int[50,50];
        Console.Write("\n\nDisplay the upper triangular of a given matrix :\n");
        Console.Write("----------------------------------------------\n");
        Console.Write("Input the size of the square matrix : ");
        n = Convert.ToInt32(Console.ReadLine());
        Console.Write("Input elements in the first matrix :\n");
        for(i=0; i<n; i++)
            {
                for(j=0; j<n; j++)
                    {
                        Console.Write("element - [{0}],[{1}] : ",i,j);
                        arr1[i,j] = Convert.ToInt32(Console.ReadLine());
                    }
            }
        Console.Write("The matrix is :\n");
        for(i=0; i<n; i++)
            {
                for(j=0; j<n ; j++)
                    Console.Write("{0}  ",arr1[i,j]);
                Console.Write("\n");
            }
        Console.Write("\nSetting zero in upper triangular matrix\n");
        for(i=0; i<n; i++)
            {
                Console.Write("\n");
                for(j=0; j<n; j++)
                    if(i>=j)
                        Console.Write("{0}  ",arr1[i,j]);
                    else
                        Console.Write("{0}  ",0);
            }
        Console.Write("\n\n");
    }
}