Butterfly

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{

    public static void Main()
    {
        int n = int.Parse(Console.ReadLine());

        string topFirst = new string('*', n - 2) + "\\ /" + new string('*', n - 2);
        string topSecond = new string('-', n - 2) + "\\ /" + new string('-', n - 2);

        string bottomFirst = new string('*', n - 2) + "/ \\" + new string('*', n - 2);
        string bottomSecond = new string('-', n - 2) + "/ \\" + new string('-', n - 2);

        for (int i = 0; i < n-2; i++)
        {
            if (i % 2 == 0)
            {
                Console.WriteLine(topFirst);
            }
            else
            {
                Console.WriteLine(topSecond);
            }
        }
        Console.WriteLine(new string(' ',n-1) + "@" + new string(' ', n - 1));

        for (int i = 0; i < n - 2; i++)
        {
            if (i % 2 == 0)
            {
                Console.WriteLine(bottomFirst);
            }
            else
            {
                Console.WriteLine(bottomSecond);
            }
        }
    }
}