Proble 19 - Crossfire

using System;
using System.Collections.Generic;

class Crossfire
{
    static void Main()
    {
        string input = Console.ReadLine();

        string[] matrixParams = input.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries);

        int rows = int.Parse(matrixParams[0]);
        int cols = int.Parse(matrixParams[1]);

        int[, ] matrix = new int[rows, cols];

        for (int i = 0; i < matrix.GetLength(0); i++)
        {
            for (int j = 0; j < matrix.GetLength(1); j++)
            {
                matrix[i, j] = (j + 1) + (i * rows);
            }
        }

        int[][] resultMatrix = new int[rows][];

        for (int i = 0; i < matrix.GetLength(0); i++)
        {
            resultMatrix[i] = new int[matrix.GetLength(1)];
            for (int j = 0; j < matrix.GetLength(1); j++)
            {
                resultMatrix[i][j] = matrix[i, j];
            }
        }

        while (true)
        {
            string command = Console.ReadLine();

            if (command == "Nuke it from orbit")
            {
                break;
            }

            string[] commandParams = command.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries);

            int centerRow = Math.Abs(int.Parse(commandParams[0]));
            int centerCol = Math.Abs(int.Parse(commandParams[1]));
            int radius = int.Parse(commandParams[2]);

            //Checking if the center coordinates are in the matrix and if so, putting the center of the cross

            if ((centerRow >= 0 && centerRow < resultMatrix.Length) && (centerCol >= 0 && centerCol < resultMatrix[centerRow].Length))
            {
                //Setting the center of the cross
                resultMatrix[centerRow][centerCol] = 0;

                //Creating the cross based on the radius, starting from the center of the cross and going up, down, left and right

                for (int i = 0; i <= radius; i++)
                {
                    //Going up from the center of the cross
                    int cellUp = centerRow - i;

                    if (cellUp >= 0)
                    {
                        if (centerCol < resultMatrix[cellUp].Length)
                        {
                            resultMatrix[cellUp][centerCol] = 0;
                        }
                    }

                    //Going down from the center of the cross
                    int cellDown = centerRow + i;

                    if (cellDown < resultMatrix.Length)
                    {
                        if (centerCol < resultMatrix[cellDown].Length)
                        {
                            resultMatrix[cellDown][centerCol] = 0;
                        }
                    }

                    //Going left from the center of the cross
                    int cellLeft = centerCol - i;

                    if (cellLeft >= 0)
                    {
                        resultMatrix[centerRow][cellLeft] = 0;
                    }

                    //Going right from the center of the cross
                    int cellRight = centerCol + i;

                    if (cellRight < resultMatrix[centerRow].Length)
                    {
                        resultMatrix[centerRow][cellRight] = 0;
                    }
                }

                //Adding the remaining cells into a list
                List<List<int>> remainingCells = new List<List<int>>();

                for (int j = 0; j < resultMatrix.Length; j++)
                {
                    remainingCells.Add(new List<int>());
                    for (int k = 0; k < resultMatrix[j].Length; k++)
                    {
                        if (resultMatrix[j][k] != 0)
                        {
                            remainingCells[j].Add(resultMatrix[j][k]);
                        }
                    }
                }

                //Re-initializing the result matrix and filling it with the values in the list
                resultMatrix = new int[remainingCells.Count][];

                for (int j = 0; j < resultMatrix.Length; j++)
                {
                    resultMatrix[j] = new int[remainingCells[j].Count];
                    for (int k = 0; k < resultMatrix[j].Length; k++)
                    {
                        resultMatrix[j][k] = remainingCells[j][k];
                    }
                }
            }
        }

        for (int i = 0; i < resultMatrix.Length; i++)
        {
            for (int j = 0; j < resultMatrix[i].Length; j++)
            {
                Console.Write(resultMatrix[i][j] + " ");
            }
            Console.WriteLine();
        }
    }
}