Bombs_RetakeExam_17Dec2018

using System;
using System.Linq;

namespace Bombs_AdvancedRetakeExam_17Dec2018
{
    class Program
    {
        static int[,] matrix;
        static void Main(string[] args)
        {

            int size = int.Parse(Console.ReadLine());

            matrix = new int[size, size];

            for (int i = 0; i < size; i++)
            {
                int[] row = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

                for (int j = 0; j < row.Length; j++)
                {
                    matrix[i, j] = row[j];
                }
            }

            string[] coordinates = Console.ReadLine().Split(' ');

            if (size > 1)
            {
                for (int i = 0; i < coordinates.Length; i++)
                {
                    string[] coordinate = coordinates[i].Split(',');
                    int row = int.Parse(coordinate[0]);
                    int column = int.Parse(coordinate[1]);

                    if (row == 0)
                    {
                        if (column == 0)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row, column + 1);
                                ChangeCell(row, column, row + 1, column + 1);
                                ChangeCell(row, column, row + 1, column);
                                matrix[row, column] = 0;
                            }
                        }
                        else if (column == size - 1)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row + 1, column);
                                ChangeCell(row, column, row + 1, column - 1);
                                ChangeCell(row, column, row, column - 1);
                                matrix[row, column] = 0;
                            }
                        }
                        else
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row, column + 1);
                                ChangeCell(row, column, row + 1, column + 1);
                                ChangeCell(row, column, row + 1, column);
                                ChangeCell(row, column, row + 1, column - 1);
                                ChangeCell(row, column, row, column - 1);
                                matrix[row, column] = 0;
                            }
                        }
                    }
                    else if (row == size - 1)
                    {
                        if (column == 0)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column + 1);
                                ChangeCell(row, column, row, column + 1);
                                matrix[row, column] = 0;
                            }
                        }
                        else if (column == size - 1)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column - 1);
                                ChangeCell(row, column, row, column - 1);
                                matrix[row, column] = 0;
                            }
                        }
                        else
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column + 1);
                                ChangeCell(row, column, row, column + 1);
                                ChangeCell(row, column, row, column - 1);
                                ChangeCell(row, column, row - 1, column - 1);
                                matrix[row, column] = 0;
                            }
                        }
                    }
                    else
                    {
                        if (column == 0)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column + 1);
                                ChangeCell(row, column, row, column + 1);
                                ChangeCell(row, column, row + 1, column + 1);
                                ChangeCell(row, column, row + 1, column);
                                matrix[row, column] = 0;
                            }
                        }
                        else if (column == size - 1)
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column - 1);
                                ChangeCell(row, column, row, column - 1);
                                ChangeCell(row, column, row + 1, column - 1);
                                ChangeCell(row, column, row + 1, column);
                                matrix[row, column] = 0;
                            }
                        }
                        else
                        {
                            if (matrix[row, column] > 0)
                            {
                                ChangeCell(row, column, row - 1, column);
                                ChangeCell(row, column, row - 1, column + 1);
                                ChangeCell(row, column, row, column + 1);
                                ChangeCell(row, column, row + 1, column + 1);
                                ChangeCell(row, column, row + 1, column);
                                ChangeCell(row, column, row + 1, column - 1);
                                ChangeCell(row, column, row, column - 1);
                                ChangeCell(row, column, row - 1, column - 1);
                                matrix[row, column] = 0;
                            }
                        }
                    }
                }
            }

            int cellsAliveCount = 0;
            int cellsAliveSum = 0;

            for (int i = 0; i < size; i++)
            {
                for (int j = 0; j < size; j++)
                {
                    if (matrix[i, j] > 0)
                    {
                        cellsAliveCount++;
                        cellsAliveSum += matrix[i, j];
                    }
                }
            }

            Console.WriteLine($"Alive cells: {cellsAliveCount}");
            Console.WriteLine($"Sum: {cellsAliveSum}");

            for (int i = 0; i < size; i++)
            {
                for (int j = 0; j < size; j++)
                {
                    Console.Write($"{matrix[i, j]} ");
                }

                Console.WriteLine();
            }
        }

        static void ChangeCell(int bombRow, int bombColumn, int row, int column)
        {
            if (matrix[row, column] > 0)
            {
                matrix[row, column] -= matrix[bombRow, bombColumn];
            }
        }
    }
}