using System;

public class Program

{

    public static void Main()

    {

        //Marifer López

        int score;

        Console.WriteLine("Hi! can you give me your bowling score?");

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

        if(score > 300)

        {

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

        }

        else if(score == 300)

        {

        Console.WriteLine("Perfect score!");

        }

        else if(score >= 200)

        {

        Console.WriteLine("Great score!");

        }

        else if(score >= 100)

        {

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

        }

        else if(score < 100)

        {

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

        }

    }

}