using System;

using System.Collections.Generic;

using System.Text;

​

namespace Minesweeper

{

    public class Square 

    {

        private readonly int _value;

​

        public Square(int value)

        {

            _value = value;

        }

​

        public bool IsMine => _value < 0;

        public bool IsEmpty => _value == 0;

        public int Value => _value;

​

        public override string ToString()

        {

            if (IsEmpty)

            {

                return "_";

            }

            return IsMine ? "*" : Value.ToString();

        }

    }

    public class Minesweeper

    {

        public Square[,] Squares { get; private set; }

​

        public Minesweeper(int size, int mines)

        {

            // this is done and does not have to be touched

            Init(size);

            FillRandom(mines);

            CountMines();

        }

​

        private void Init(int size)

        {

            // Please initialize the Squares array with the dimensions 'size' x 'size'

        }

​

        private List<Square> GetNeighbours(int row, int column)

        {

            // Please implement

            // For a given square (identified by row and column) the neighbour squares are to be returned

            return new List<Square>();

        }

        private int CountMines(List<Square> neighbours)

        {

            // Please implement

            // For a given list of neighbour squares the number of mines is to be returned

            return 0;

        }

        private void CountMines()

        {

            // Please count the mines for all squares now. Remember: you can use previously implemented methods

        }

        // this is done and does not have to be touched

        private void FillRandom(int mines)

        {

            var r = new Random();

            var maxMines = Squares.GetLength(0) * Squares.GetLength(1) / 2;

            if (mines > maxMines)

            {

                mines = maxMines;

            }

​

            var minesSet = 0;

            while (minesSet < mines)

            {

                var randomRow = r.Next() % Squares.GetLength(0);

                var randomColumn = r.Next() % Squares.GetLength(1);

                if (Squares[randomRow,randomColumn] != null && Squares[randomRow,randomColumn] .IsMine)

                {

                    continue;

                }

                Squares[randomRow,randomColumn] = new Square(-1);

                minesSet++;

            }

        }

​

        // this is done and does not have to be touched

        public override string ToString()

        {

            var sb = new StringBuilder();

            for (var row = 0; row < Squares.GetLength(0); row++)

            {

                for (var column = 0; column < Squares.GetLength(1); column++)

                {

                    if (Squares[row, column] == null)

                    {

                        sb.Append("/");

                        continue;

                    }

                    sb.Append(Squares[row,column]);

                }

                sb.AppendLine();

            }

            return sb.ToString();

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            var minesweeper = new Minesweeper(10, 10);

            Console.WriteLine(minesweeper);

        }

    }

}