using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var a = getFills(new List<string>()

        {"aabba", "aabba", "aaacb", "acccb"});

        Console.WriteLine(a);

    }

​

    public static int getFills(List<string> pictures)

    {

        int row = pictures.Count(), m = 0;

        int col = pictures.First().ToCharArray().Count();

        char[, ] s = new char[row, col];

        for (int i = 0; i < row; i++)

        {

            string str = pictures[i];

            m = 0;

            for (int j = 0; j < col; j++)

            {

                if (m < str.Length)

                {

                    s[i, j] = str[m];

                }

​

                m++;

            }

        }

​

        // Printing the grid

        for (int i = 0; i < row; i++)

        {

            for (int j = 0; j < col; j++)

            {

                if (s[i, j] == 0)

                {

                    break;

                }

​

                Console.Write(s[i, j]);

            }

​

            Console.WriteLine("");

        }

​

        // Painting the grid

        int fills = 0;

        for (int i = 0; i < row; i++)

        {

            for (int j = 0; j < col; j++)

            {

                if (i == 0 && j == 0)

                {

                    fills++;

                }

                else if (i == 0 && j > 0)

                {

                    if (s[i, j] == s[i, j - 1])

                    {

                    }

                    else

                    {

                        fills++;

                    }

                }

                else if (i > 0 && j == 0)

                {

                    if (s[i, j] == s[i - 1, j])

                    {

                    }

                    else

                    {

                        fills++;

                    }

                }

                else if (i > 0 && j > 0)

                {

                    if (s[i, j] == s[i - 1, j] || s[i, j] == s[i, j - 1])

                    {

                    }

                    else if(j + 1 < col && s[i, j] == s[i, j + 1])

                    {

                    }

                    else 

                    {

                        fills++;

                    }

                }

            }

        }

​

        return fills;

    }

}