using System;

public class Program

{

    public static void Main()

    {

        int a , i ; 

        Console.WriteLine("הכנס מספר");

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

        if ( a > 9 && a < 100 ) 

        for ( i = 0 ; i <= a ; i ++ )

            Console.WriteLine(i);

        else if ( a > 99 && a < 1000 )

        for ( i = a ; i >= 0 ; i -- )

           Console.WriteLine(i);

​

​

    }

}