02. waship (exam) 2021 20 feb

using System;
using System.Linq;
using System.Collections.Generic;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {

            int n = int.Parse(Console.ReadLine());
            string[] command = Console.ReadLine().Split(',', StringSplitOptions.RemoveEmptyEntries).ToArray();

            string[,] matrix = new string[n, n];

            int playerOneShips = 0;
            int playerTwoShips = 0;
            int shipsDestroyed = 0;

            for (int row = 0; row < n; row++)
            {
                string[] line = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries);
                for (int col = 0; col < n; col++)
                {
                    matrix[row, col] = line[col];

                    if (line[col] == "<")
                    {
                        playerOneShips++;
                    }
                    else if (line[col] == ">")
                    {
                        playerTwoShips++;
                    }
                }
            }

            for (int i = 0; i < command.Length; i++)
            {
                int[] dif = command[i]
                    .Split(' ', StringSplitOptions.RemoveEmptyEntries)
                    .Select(int.Parse)
                    .ToArray();
                int currRow = dif[0];
                int currCol = dif[1];

                if (!IsValidCell(currRow, currCol, n) || matrix[currRow, currCol] == "*")
                {
                    continue;
                }

                if (IsValidCell(currRow, currCol, n) && matrix[currRow, currCol] == ">")
                {
                    playerTwoShips--;
                    shipsDestroyed++;
                }
                else if (IsValidCell(currRow, currCol, n) && matrix[currRow, currCol] == "<")
                {
                    playerOneShips--;
                    shipsDestroyed++;
                }
                else if (matrix[currRow, currCol] == "#")
                {

                    if (IsValidCell(currRow + 1, currCol, n))
                    {
                        if (matrix[currRow + 1, currCol] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow + 1, currCol] = "X";
                        }
                        else if (matrix[currRow + 1, currCol] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow + 1, currCol] = "X";
                        }
                    }
                    if (IsValidCell(currRow - 1, currCol, n))
                    {
                        if (matrix[currRow - 1, currCol] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow - 1, currCol] = "X";
                        }
                        else if (matrix[currRow - 1, currCol] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow - 1, currCol] = "X";
                        }
                    }
                    if (IsValidCell(currRow, currCol + 1, n))
                    {
                        if (matrix[currRow, currCol + 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow, currCol + 1] = "X";
                        }
                        else if (matrix[currRow, currCol + 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow, currCol + 1] = "X";
                        }
                    }
                    if (IsValidCell(currRow, currCol - 1, n))
                    {
                        if (matrix[currRow, currCol - 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow, currCol - 1] = "X";
                        }
                        else if (matrix[currRow, currCol - 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow, currCol - 1] = "X";
                        }
                    }
                    if (IsValidCell(currRow + +1, currCol + 1, n))
                    {
                        if (matrix[currRow + 1, currCol + 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow + 1, currCol + 1] = "X";
                        }
                        else if (matrix[currRow + 1, currCol + 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow + 1, currCol + 1] = "X";
                        }
                    }
                    if (IsValidCell(currRow - 1, currCol - 1, n))
                    {
                        if (matrix[currRow - 1, currCol - 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow - 1, currCol - 1] = "X";
                        }
                        else if (matrix[currRow - 1, currCol - 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow - 1, currCol - 1] = "X";
                        }
                    }
                    if (IsValidCell(currRow + 1, currCol - 1, n))
                    {
                        if (matrix[currRow + 1, currCol - 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow + 1, currCol - 1] = "X";
                        }
                        else if (matrix[currRow + 1, currCol - 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow + 1, currCol - 1] = "X";
                        }
                    }
                    if (IsValidCell(currRow - 1, currCol + 1, n))
                    {
                        if (matrix[currRow - 1, currCol + 1] == ">")
                        {
                            playerTwoShips--; shipsDestroyed++; matrix[currRow - 1, currCol + 1] = "X";
                        }
                        else if (matrix[currRow - 1, currCol + 1] == "<")
                        {
                            playerOneShips--; shipsDestroyed++; matrix[currRow - 1, currCol + 1] = "X";
                        }

                    }

                    if (playerOneShips == 0 || playerTwoShips == 0)
                    {
                        break;
                    }
                }

                if (playerOneShips == 0)
                {
                    Console.WriteLine($"Player Two has won the game! {shipsDestroyed} ships have been sunk in the battle.");
                }
                else if (playerTwoShips == 0)
                {
                    Console.WriteLine($"Player One has won the game! {shipsDestroyed} ships have been sunk in the battle.");
                }
                else if (playerTwoShips != 0 && playerOneShips != 0)
                {
                    Console.WriteLine($"It's a draw! Player One has {playerOneShips} ships left. Player Two has {playerTwoShips} ships left.");
                }

            }

             static bool IsValidCell(int row, int col, int n)
            {
                return row >= 0 && row < n && col >= 0 && col < n;
            }
        }
    }
}