MaxSumOfMatrix

using System;

class MatrixMaxSum
{
    //Write a program that reads a rectangular matrix of size N x M and finds in it the square 3 x 3 that has maximal sum of its elements.

    static void Main()
    {
        // Input N and M
        Console.WriteLine("Enter N ");
        int rolCount = int.Parse(Console.ReadLine());
        Console.WriteLine("Enter M ");
        int colCount = int.Parse(Console.ReadLine());
        int maxRol = 0;
        int maxCol = 0;

        if (rolCount < 3 || colCount < 3)
        {
            Console.WriteLine("N >= 3 and M >=3");
            return; //Stop task
        }
        // Solution
        int[,] array = new int[rolCount, colCount];
        int sum = 0;
        int maxSum = 0;
        // Input elements of matrix
        Console.WriteLine("Enter elements ex. 1 3 4 ..");
        for (int i = 0; i < rolCount; i++)
        {
            string rolStr = Console.ReadLine(); // ex. 1 2 3
            string[] emptySpace = new string[] {" "}; // remove from split empty space
            string[] colStrArray = rolStr.Split(emptySpace, StringSplitOptions.RemoveEmptyEntries);

            for (int j = 0; j < colStrArray.Length; j++)
            {
                array[i, j] = int.Parse(colStrArray[j]); // Input digits in array
            }
        }

        for (int moveDown = 0; moveDown <= rolCount - 3; moveDown++)
        {
            for (int moveRight = 0; moveRight <= colCount - 3; moveRight++)
            {
                sum = 0;
                //Sumator
                for (int rol = moveDown; rol < 3 + moveDown; rol++)
                {
                    for (int col = moveRight; col < 3 + moveRight; col++)
                    {
                        sum += array[rol, col];
                    }
                }
                if (sum > maxSum)
                {
                    maxSum = sum;
                    maxRol = moveDown;
                    maxCol = moveRight;
                }
            }
        }
        // Output
        Console.WriteLine("Max sum is : {0} ", maxSum);
        for (int i = maxRol; i < maxRol + 3; i++)
        {
            for (int j = maxCol; j < maxCol + 3; j++)
            {
                Console.Write(array[i,j]+" ");
            }
            Console.WriteLine();
        }
    }
}