06.SnowFlake

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

namespace _05.Snowflake
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());
            for (int i = 0; i < num - 1; i++)
            {
                Console.WriteLine(new string('.', i) +
                    "*" + new string('.', num - i) +
                    "*" + new string('.', num - i) +
                    "*" + new string('.', i));
            }

            Console.WriteLine(new string('.', num - 1) +
                new string('*', (2 * num + 3) - (2 * (num - 1))) +
                new string('.', num - 1));
            Console.WriteLine(new string('*', 2 * num + 3));
            Console.WriteLine(new string('.', num - 1) +
                new string('*', (2 * num + 3) - (2 * (num - 1))) +
                new string('.', num - 1));
            for (int i = num - 2; i >= 0; i--)
            {
                Console.WriteLine(new string('.', i) +
                    "*" + new string('.', num - i) +
                    "*" + new string('.', num - i) +
                    "*" + new string('.', i));
            }
        }
    }

}