BlurFilter

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _05.BlurFilter
{
    class BlurFilter
    {
        static void Main(string[] args)
        {
            long blurAmount = long.Parse(Console.ReadLine());
            string[] input = Console.ReadLine().Split(' ');
            long rows = long.Parse(input[0]);
            long cols = long.Parse(input[1]);
            long[,] matrix = new long[rows, cols];

            ReadMatrix(rows, cols, matrix);

            string[] target = Console.ReadLine().Split(' ');
            long rowsBlur = long.Parse(target[0]);
            long colsBlur = long.Parse(target[1]);

            //Console.WriteLine();

            long[,] newMatrix = new long[matrix.GetLength(0), matrix.GetLength(1)];

            for (int row = 0; row < matrix.GetLength(0); row++)
            {
                for (int col = 0; col < matrix.GetLength(1); col++)
                {
                    if ((row == rowsBlur && col == colsBlur) || (row == rowsBlur - 1 && col == colsBlur - 1)
                        || (row == rowsBlur - 1 && col == colsBlur) || (row == rowsBlur - 1 && col == colsBlur + 1)
                        || (row == rowsBlur && col == colsBlur - 1) || (row == rowsBlur && col == colsBlur + 1)
                        || (row == rowsBlur + 1 && col == colsBlur - 1) || (row == rowsBlur + 1 && col == colsBlur)
                        || (row == rowsBlur + 1 && col == colsBlur + 1))
                    {
                        newMatrix[row, col] = matrix[row, col] + blurAmount;
                    }
                    else
                    {
                        newMatrix[row, col] = matrix[row, col];
                    }
                }
            }

            PrintMatrix(matrix, newMatrix);
        }

        static void ReadMatrix(long rows, long cols, long[,] matrix)
        {
            for (int row = 0; row < rows; row++)
            {
                long[] cells = Console.ReadLine().Split(' ').Select(long.Parse).ToArray();

                for (int col = 0; col < cols; col++)
                {
                    matrix[row, col] = cells[col];
                }
            }
        }

        static void PrintMatrix(long[,] matrix, long[,] newMatrix)
        {
            for (int row = 0; row < matrix.GetLength(0); row++)
            {
                for (int col = 0; col < matrix.GetLength(1); col++)
                {
                    Console.Write(newMatrix[row, col] + " ");
                }
                Console.WriteLine();
            }
        }
    }
}