using System;

public class Program

{

    public static void Main()

    {

        const int n = 4;

            int i, j, f1=1, f2=4, f3=2, f4=3, aux;

            int[,] A = { { 1, 1, 2, 2 }, { 1, 1, 2, 2 }, { 3, 3, 4, 4 }, { 3, 3, 4, 4 } };

​

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

            {

                aux = A[f1 - 1, i];

                A[f1 - 1, i] = A[f2 - 1, i];

                A[f2 - 1, i] = aux;

                A[f3 - 1, i] = A[f4 - 1, i];

                A[f4 - 1, i] = aux;

            }

​

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

            {

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

​

                    Console.Write(A[j, i] + "\t");

​

                Console.WriteLine();

    }

}}