using System;

public class Program

{

    public static void Main()

    {

        //Louis Ramiro Alicea Hernandez

        int num;

        Console.WriteLine("PLEASE GIVE ME YOUR BOWLING SCORE");

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

        if( num == 300)

        {

        Console.WriteLine("Perfect score!");    

        }

        if(num>= 200 && num < 300)

        {

        Console.WriteLine("Great score!");

        }   

        if(num >= 100 && num < 200)

        {

        Console.WriteLine("Good, you can do better!");

        }   

        if(num < 100)

        {

        Console.WriteLine("Sorry, you are not good at bowling.");   

        }   

        if(num > 300)

        {

        Console.WriteLine("That’s impossible, please start again.");    

        }   

    }

}