butterfly

using System;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        //Upper part
        for (int i = 1; i <= n - 2; i++)
        {
            if (i % 2 != 0)
            {
                Console.Write(new string('*', n - 2) + "\\");
                Console.Write(" ");
                Console.Write("/" + new string('*', n - 2));
                Console.WriteLine();
            }
            else
            {
                Console.Write(new string('-', n - 2) + "\\");
                Console.Write(" ");
                Console.Write("/" + new string('-', n - 2));
                Console.WriteLine();
            }

        }

        //Middle part
        Console.Write(new string(' ', n - 1));
        Console.Write("@");
        Console.Write(new string(' ', n - 1));
        Console.WriteLine();

        //Bottom part
        for (int i = 1; i <= n - 2; i++)
        {
            if (i % 2 != 0)
            {
                Console.Write(new string('*', n - 2) + "/");
                Console.Write(" ");
                Console.Write("\\" + new string('*', n - 2));
                Console.WriteLine();
            }
            else
            {
                Console.Write(new string('-', n - 2) + "/");
                Console.Write(" ");
                Console.Write("\\" + new string('-', n - 2));
                Console.WriteLine();
            }
        }

    }
}