using System;

namespace Week3
{
  class Program
  {
    static void Main(string[] args)
    {

      int n = int.Parse(Console.ReadLine());
      for (int row = 1; row <= n; row++)
      {
        for (int col = 1; col <= n - row; col++)
        {
          Console.Write(" ");
        }
        for (int col = 0; col < row; col++)
        {
          Console.Write("* ");
        }
        Console.WriteLine();
      }

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