using System;

public class Program

{

    public static void Main()

    {

        //Victor Campos

        string name;

        Double a;

        Console.WriteLine("what was your score?");

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

        if ( a<100)

        {

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

        }

        else if ( a == 100 || a<200)

        {

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

        }   

        else if ( a == 200 || a<300)

        {

        Console.WriteLine("Great score!");

        }

        else if ( a == 300)

        {

        Console.WriteLine("Perfect score!");

        }

        else if ( a>300)

        {

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

        }   

    }

}