bradva

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication7
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            for (int row = 0; row < n; row++)
            {
                Console.Write(new string('-', 3 * n));
                Console.Write("*");
                Console.Write(new string('-', row));
                Console.Write("*");
                Console.WriteLine(new string('-', 2 * n - 2 - row));
            }
           for (int row = 0; row < n / 2; row++)
           {
              Console.Write(new string('*', 3 * n));
              Console.Write("*");
              Console.Write(new string('-', n - 1));
              Console.Write("*");
              Console.WriteLine(new string('-', n - 1));
           }
            for (int row = 0; row < n / 2; row++)
            {
                Console.Write(new string('-', 3 * n - row));
                Console.Write("*");
               if (row == n / 2 - 1)
                Console.Write(new string('*', n - 1 + (2 * row)));
               else
                Console.Write(new string('-', n - 1 + (2 * row)));
                Console.Write("*");
                Console.WriteLine(new string('-', n - row - 1));
            }
        }
    }
}