perfect diamond 85 percent

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        //upper part
        Console.WriteLine(new string(' ', n-1)+"*"+ new string(' ', n - 1));
        for (int i = 1; i < n; i++)
        {
            Console.Write(new string(' ', n-i-1));
            for (int k = 0; k < i; k++)
            {
                Console.Write("*-");
            }
            Console.Write("*");
            Console.WriteLine(new string(' ', n -i-1));
        }
        //lower part
        for (int i = n-2; i >0; i--)
        {
            Console.Write(new string(' ', n - i-1 ));
            for (int k = 0; k < i; k++)
            {
                Console.Write("*-");
            }
            Console.Write("*");
            Console.WriteLine(new string(' ', n - i-1 ));
        }
        Console.WriteLine(new string(' ', n - 1) + "*" + new string(' ', n - 1));
    }
}