using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Enter No. of Rows:");

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

            Console.Write("Enter No. of Columns:");

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

            int[ , ] myIntArray=new int[M,N];

            Console.WriteLine("Enter your Matrix Elements:");

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

            {

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

                {

                    Console.Write("[{0},{1}] = " , i , j);

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

                }

            }

            Console.WriteLine("Matrix Looks Like:");

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

            {

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

                {

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

                }

                Console.WriteLine();

            }

            int trace1=0;

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

            {

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

                {

                    if(i==j)

                       trace1=trace1+myIntArray[i,j];

                }

            }

            int trace2 = 0;

            int k = 0;

            for (int j = N - 1; j >= 0; j--)

            {

                if (k != j)

                trace2 = trace2 + myIntArray[k, j];

                k++;

            }

            Console.Write("Sum of Diagnol Elements:{0}", (trace1 + trace2));

            Console.ReadKey();

    }

}