03.00 Headphones

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

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

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