Firm

import java.text.DecimalFormat;
import java.util.Scanner;

public class P02_Firm {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        DecimalFormat df = new DecimalFormat("0.##");

        int needHours = Integer.parseInt(scanner.nextLine());
        int haveDays = Integer.parseInt(scanner.nextLine());
        int countWorkersExtra = Integer.parseInt(scanner.nextLine());

        double minusTraining = haveDays-(haveDays*0.1);
        double haveHour = minusTraining*8;
        double extraHours = Math.floor(countWorkersExtra*(haveDays*2));
        double allHour = Math.floor(haveHour+extraHours);

        double left = 0.0;
        double need = 0.0;

        if (needHours<=allHour) {
            left=allHour-needHours;
            System.out.printf("Yes!%s hours left.", df.format(left));
        } else {
            need=needHours-allHour;
            System.out.printf("Not enough time!%s hours needed.", df.format(need));
        }
    }
}