using System;
namespace P3_9
{
    class Program
    {
      static void Main(string[] args)
        {
            Console.Write(":");
            int lines = int.Parse(Console.ReadLine());
            Console.WriteLine("");
            for (int i = 1; i <= lines; i++)
            {
                for (int k = 1; k <= lines - i; k++)
                     Console.Write(" ");
                for (int j = 1; j <= i * 2 - 1; j++)
                     Console.Write("*");
                Console.WriteLine("");

            }
            Console.ReadLine();
     }
    }
}
