using System;

public class Program

{

    public static void Main()

    {

        int num, i, j, k;

            Console.Write("input n:");

            num = int.Parse(Console.ReadLine());

            for (i = 1; i <= num; i++)

            {

              for (j = 1; j < num - i + 1; j++)

              {

                 Console.Write(" ");

              }

              for (k = 1; k <= i; k++)

              {

                  Console.Write("*");

                  Console.Write(" ");

              }

                  Console.WriteLine();              

            }

            Console.ReadLine();

    }

}