Figure.AceOfDiamonds

using System;
class AceOfDiamonds
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());

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

        // second
        int secondLines = n / 2 - 1;
        int secondAt = 1;

        for (int i = 0; i < n/2-1; i++)
        {
            Console.WriteLine("*{0}{1}{0}*", new string('-', secondLines), new string('@', secondAt));
            secondAt += 2;
            secondLines--;
        }
        // end second
        // third
        Console.WriteLine("*{0}*",new string ('@',n-2));
        // end third

        // four
        for (int i = 0; i < n / 2 - 1; i++)
        {
            secondAt -= 2;
            secondLines++;
            Console.WriteLine("*{0}{1}{0}*", new string('-', secondLines), new string('@', secondAt));

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