using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication28
{
    class Program
    {
        const int n = 4;
        static void Main(string[] args)
        {
            Random rd = new Random();
            int[,] A = new int[4, 4];
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    A[i, j] = rd.Next(-100, 100);
                    Console.Write(A[i, j] + "\t");
                }
                Console.WriteLine();
            }
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    A[0, j] = 0;
                    A[3, j] = 0;
                    A[i, 0] = 0;
                    A[i, 3] = 0;
                }
            }
            Console.WriteLine();
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write(A[i, j] + "\t");
                }
                Console.WriteLine();
            }
        }
    }
}