RockLq

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


class RockLq
{
    static void Main(string[] args)
    {
        int n = int.Parse(Console.ReadLine());

        int width = 3 * n;
        int height = 2 * n;

        Console.WriteLine("{0}{1}{0}",
            new string('.', n),
            new string('*', n),
            new string('.', n));

        int secondPart = (n-1) / 2;
        int secondPart2 = n - 2;
        int secondPart3 = n + 2;

        for (int i = 0; i <= secondPart - 1; i++)
        {

            Console.WriteLine("{0}*{1}*{0}",
                new string('.', secondPart2),
                new string('.', secondPart3),
                new string ('.', secondPart2));

            secondPart2-=2;
            secondPart3 += 4;

        }

        int thirdPart = n - 2;
        int thirdPart2 = n;

        Console.WriteLine("*{0}*{1}*{0}*",
            new string('.', thirdPart),
            new string('.', thirdPart2),
            new string('.', thirdPart));

        int fourthPart = (n - 3) / 2; // много важен ред..РЕШАВАЩ
        int fourthPart2 = n - 4;
        int fourthPart3 = n - (n - 1);
        int fourthPart4 = n;


        for (int i = 0; i < fourthPart ; i++)
        {
            Console.WriteLine("*{0}*{1}*{2}*{1}*{0}*",
                new string('.', fourthPart2),
                new string('.', fourthPart3),
                new string('.', fourthPart4),
                new string('.', fourthPart3),
                new string('.', fourthPart2));
            fourthPart2 -= 2;
            fourthPart3 += 2;
        }
        int fifthPart = n - 1;
            int fifthPart2 = n;

            Console.WriteLine("{0}*{1}*{0}",
                new string('.', fifthPart),
                new string('.', fifthPart2),
                new string('.', fifthPart));

        int sixthPart = n - 2;
        int sixthPart2 = n - 2;
        int sixthPart3 = n + 2;



        for (int i = 0; i < sixthPart; i++)
        {
            Console.WriteLine("{0}*{1}*{0}",
                new string('.', sixthPart2),
                new string('.', sixthPart3),
                new string('.', sixthPart2));

            sixthPart2 -= 1;
            sixthPart3 += 2;

        }

        int lastPart = n * 3;

        Console.WriteLine("{0}",
            new string ('*', lastPart));


    }
}