05.Триъгълник

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

namespace Триъгълник
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());


            int width = (4 * N) + 1;
            int height = (2 * N) + 1;
            int dots = 1;
            int hash = 2 * N - 1; //(4 * N - 3) / 2;
            int spaces = 1;

            Console.WriteLine(new string('#', width));

            for (int row = 1; row <= N; row++)
            {
                if (row == N / 2 + 1)
                {

                    Console.WriteLine("{0}{1}{2}(@){2}{1}{0}", new string('.', dots), new string('#', hash)
                    , new string(' ', (spaces - 3) / 2), new string('#', hash), new string('.', dots));
                    dots++;
                    hash -=2;
                    spaces += 2;
                }

                else
                {
                    Console.WriteLine("{0}{1}{2}{1}{0}",
            new string('.', dots),
            new string('#', hash),
            new string(' ', spaces));
                    dots++;
                    hash -= 2;
                    spaces += 2;

                }
            }

            hash = 2 * N - 1; ;
            for (int row = 1; row <= N; row++)
            {
                Console.WriteLine("{0}{1}{0}",
                    new string('.', dots),
                    new string('#', hash));

                dots++;
                hash -= 2;


            }


        }
    }
}