using System;

​

class Solution {

    static void hourGlassSum(int n, int[,] arr)

    {

        int maxSum = int.MinValue;

        //int c = 0;

        for(int i=0; i<n-2; i++)

        {

            int sum = 0;

            for(int j=0; j<n-2; j++)

            {

                sum = arr[i,j] + arr[i,j+1] + arr[i,j+2] + arr[i+1,j+1] + arr[i+2,j] + arr[i+2,j+1] + arr[i+2,j+2];

                if(sum > maxSum)

                {

                    maxSum = sum;

                }

            }

        }

        Console.WriteLine(maxSum);

    }

​

​

    static void Main(string[] args) {

        int[,] arr = new int[6,6]{{1, 1, 1, 0, 0, 0},{0, 1, 0, 0, 0, 0},{1, 1, 1, 0, 0, 0},{0, 0, 2, 4, 4, 0},{0, 0, 0, 2, 0, 0},{0, 0, 1, 2, 4, 0}};

​

        /*for (int i = 0; i < 6; i++) {

            arr[i] = Array.ConvertAll(Console.ReadLine().Split(' '), arrTemp => Convert.ToInt32(arrTemp));

        }*/

        hourGlassSum(6, arr);

    }

}

​