using System;

public class Program

{

    public static void Main()

    {

​

            int m = 10; //linii

            int n = 10; //coloane 

​

            Console.Write("introdu nr de linii:");

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

​

            Console.Write("nr de coloane:");

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

​

            int[,] matr = new int[m, n]; 

​

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

            { 

​

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

                { 

​

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

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

​

                } 

​

            } 

​

            //parcurgem matricea 

​

            if (m == n) //matrice patratica care are diagonala

            { 

​

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

                     {

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

                             { if( i + j < n + 1 )

                                     matr[i][j]= i;

                                   else

                                       { if(i + j > n+ 1)

                                              matr[i][j]= j;

                               }

                          }

                    }

​

            //afisare matrice:

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

            {

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

                {

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

                }

                Console.WriteLine();

            } 

​

​

            Console.ReadKey();

    }

}