Beer Stock

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long neededBeers = Long.parseLong(scanner.nextLine()),
                deliveredBeers = 0;
        String input;
        while (!(input = scanner.nextLine()).equals("Exam Over")) {
            int index = input.indexOf(' ');
            long amount = Long.parseLong(input.substring(0, index));
            String type = input.substring(index + 1);
            if (type.equals("sixpacks")) {
                amount *= 6;
            } else if (type.equals("cases")) {
                amount *= 24;
            }
            deliveredBeers += amount;
        }

        deliveredBeers -= deliveredBeers / 100;
        long diff = Math.abs(neededBeers - deliveredBeers),
                cases = diff / 24, sixpacks = diff % 24 / 6, beers = diff % 6;

        if (deliveredBeers >= neededBeers) {
            System.out.printf("Cheers! Beer left: %d cases, %d sixpacks and %d beers.", cases, sixpacks, beers);
        } else {
            System.out.printf("Not enough beer. Beer needed: %d cases, %d sixpacks and %d beers.", cases, sixpacks, beers);
        }
    }
}