05. Firm

# 05. Firm
import math

need_hours = int(input())
days = int(input())
guys = int(input())

end_days = days - (days * 0.1)
day_and_hours = end_days * 8
guys_more_hours = guys * (2 * days)
all_hours = math.trunc(day_and_hours + guys_more_hours)
end = all_hours - need_hours
end1 = need_hours - all_hours
if all_hours >= need_hours:
    print(f"Yes!{end} hours left.")
elif all_hours <= need_hours:
    print(f"Not enough time!{end1} hours needed.")