using System;
public class Program
{
public static void Main()
{ Random rand = new Random();
int n = 5, m = 5;
int Sumtri = 0;
int[,]mas = new int[n,m];
for (int i=0; i<n ; i++)
for (int j=0 ; j<m; j++)
mas[i,j] = rand.Next(0,10);
Console.Write(mas[i,j]+" ");
}
Console.WriteLine();
for (int j=0; j<m; j++)
Sumtri += mas[2,j];
Console.Write(Sumtri);