using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

            int[,] matrix=

        {

            {7, 5, 6, 2, 8, 5, 6},

            {9, 5, 6, 2, 1, 7, 6},

            {7, 7, 8, 0, 4, 4, 6},

            {0, 5, 2, 2, 8, 0, 9},

            {3, 8, 2, 7, 0, 3, 6},

        };

        int bestSum =int.MinValue;

        int bestRow=0;

        int bestCol=0;

        for (int row =0; row<matrix.GetLength(0)-3; row++)

        {

            for (int col=0; col<matrix.GetLength(1)-3; col++)

            {

                int sum=matrix[row,col]+ matrix[row,col+1]+matrix[row+1,col]+matrix[row+1,col+1]+matrix[row,col+2]+matrix[row+1,col+2]+matrix[row+2,col+2]+matrix[row+2,col]+matrix[row+2,col+1]

                + matrix[row,col+3]+ matrix[row+1,col+3]+ matrix[row+2,col+3]+ matrix[row+3,col]+ matrix[row+3,col+1]+ matrix[row+3,col+2]+ matrix[row+3,col+3] ;

                if(sum >bestSum)

                {

                    bestSum=sum;

                    bestRow=row;

                    bestCol=col;

                }

    }

}

        Console.WriteLine("The best platform is:");

        Console.WriteLine("{0} {1} {2} {3}",matrix[bestRow, bestCol], matrix[bestRow, bestCol+1],matrix[bestRow+1, bestCol+2], matrix[bestRow, bestCol+2], matrix[bestRow, bestCol+3]);

        Console.WriteLine("{0} {1} {2} {3}",matrix[bestRow+1, bestCol], matrix[bestRow+1, bestCol+1], matrix[bestRow+1, bestCol+2], matrix[bestRow+1, bestCol+3]);

        Console.WriteLine("{0} {1} {2} {3}",matrix[bestRow+2, bestCol], matrix[bestRow+2, bestCol+1], matrix[bestRow+2, bestCol+2], matrix[bestRow+2, bestCol+3]);

        Console.WriteLine("{0} {1} {2} {3}",matrix[bestRow+3, bestCol], matrix[bestRow+3, bestCol+1], matrix[bestRow+3, bestCol+2], matrix[bestRow+3, bestCol+3]);

        Console.WriteLine("The maximal sum is:{0}",bestSum);

    }

}

​