05. Firm

needed_hours = int(input())
days = int(input())
workers = int(input())
total_hours = int(days * 0.9 * workers * (8 + 2))

if needed_hours > total_hours:
    print(f'Not enough time!{needed_hours - total_hours} hours needed.')
else:
    print(f'Yes!{total_hours - needed_hours} hours left.')