using System;

public class Program

{

    public static void Main()

    {

        int row,col,i,j;

        int sum=0;

        int daig1=0,daig2=0;

        Console.WriteLine("enter number of rows and column");

        row=int.Parse(Console.ReadLine());

        col=int.Parse(Console.ReadLine());

        int [ , ] matrix=new int[row , col];

        Console.WriteLine("matrix length is ={0}",matrix.Length);

        for(i=0;i<row;i++)

        {       

            for(j=0;j<col;j++)

                {

                    matrix[i,j]=int.Parse(Console.ReadLine());

                }

        }

        Console.WriteLine("enter elements of matrix ={0}",matrix.Length);

​

        for(i=0;i<row;i++)

        {       

            for(j=0;j<col;j++)

                {

                Console.Write(" {0}",matrix[i,j]);

                }

        Console.WriteLine(" ");

​

        }

        for(i=0;i<row;i++)

        {       

            for(j=0;j<col;j++)

                {

                    if(i==j)

                    {

                        daig1=daig1 + matrix[i,j];

                    }

                }

        }

                        Console.WriteLine(" sum of first daigonal element is ={0}",daig1);

​

        for(i=0;i<row;i++)

        {       

            for(j=0;j<col;j++)

                {

                    if(i+j==row-1)

                    {

                        daig2=daig2 + matrix[i,j];

                    }

                }

        }

                                Console.WriteLine(" sum of second daigonal element is ={0}",daig2);

​

​

    }

}