using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        /*

        int k=3;

        while(k-->0)

            Console.WriteLine(k);

        */

        int[,] arr = new int[4,4] 

        { {1, 2, 3, 4},

        {5, 6, 7, 8},

        {9, 10, 11, 12},

        {13, 14, 15, 16} };

        var row = arr.GetLength(0);

        var col = arr.GetLength(1);

        Console.WriteLine($"Row-{row}, Col- {col}");

        for(int i =0; i< row/2; i++)

        {

            Console.WriteLine("Row- "+ i);

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

            {

                Console.WriteLine("Col- "+ j);

                var temp = arr[i,j];

                arr[i, j] = arr[row-1-j, i];

                arr[row-1-j, i] = arr[row-1-i, col-1-j];

                arr[row-1-i, col-1-j] = arr[j, col-1-i];

                arr[j, col-1-i] = temp;             

            }

        }   

        // Print rotated matrix

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

            {

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

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

                Console.Write("\n");

            }

    }

}