#  Така товариш цялата програма и импортваш огромна библиотека без да има смисъл от това.
#  Импортвай само това, което ти трябва - в случая from math import floor
import math

hours_needed = int(input())
days_available = int(input())
extra_workers = int(input())

hours_after_training = days_available - (days_available * 0.10)
hours_available = hours_after_training * 8
additional_work = extra_workers * (2 * days_available)

hours_total = math.floor(hours_available + additional_work)
diff = abs(hours_total - hours_needed)

if hours_total >= hours_needed:
    print(f"Yes!{math.floor(diff)} hours left.")

else:
    # Тук имаш излишен white space между enough и time
    # print(f"Not enough  time!{math.floor(diff)} hours needed.")
    print(f"Not enough time!{math.floor(diff)} hours needed.")