using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World"); 

        Console.WriteLine(" Upper number limit : "); 

        int n = Convert.ToInt32(Console.ReadLine()); 

        Console.WriteLine("");  

        while(n >= 1) 

        { 

           Console.WriteLine(n); 

           n = n - 1; 

        }

    }

}