package com.company;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // write your code hereS
        Scanner sc = new Scanner(System.in);
       double neededMoney = Double.parseDouble(sc.nextLine());
       int neededCents = (int)(neededMoney*100);
       int countMonths = Integer.parseInt(sc.nextLine());
       double savedMoney = 0;
       int savedCents = 0;
        for (int i = 1; i <=countMonths ; i++) {

            if (i%2==1&&i!=1){
                savedCents=(int)(savedCents*0.84);
            }else if (i%4==0){
               savedCents=(int)(savedCents*1.25);
            }
            savedCents=savedCents+(int)(neededCents*0.25);
            if (savedCents-neededCents>=0){
                break;
            }
        }
        savedMoney=savedCents/100.00;
        if (savedMoney-neededMoney>=0){
            System.out.printf("Bravo! You can go to Disneyland and you will have %.2flv. for souvenirs.",savedMoney-neededMoney);
        }else{
            System.out.printf("Sorry. You need %.2flv. more.", neededMoney-savedMoney);
        }
    }
}