import java.util.Scanner;

public class BOOKFirm {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int hoursNeeded = Integer.parseInt(scanner.nextLine());
        int days = Integer.parseInt(scanner.nextLine());
        int workers = Integer.parseInt(scanner.nextLine());

        double daysProject = days - (days * 0.1);
        double hoursTotal = Math.floor((daysProject * 10) * workers);

        if (hoursNeeded <= hoursTotal) {
            System.out.printf("Yes!%.0f hours left.", hoursTotal - hoursNeeded);
        } else {
            System.out.printf("Not enough time!%.0f hours needed.", hoursNeeded - hoursTotal);
        }


    }
}