01. Back To The Past

money = float(input())
years = int(input())

money_spent = 0

for number in range(1800, years + 1):
    if years % 2 == 0:
        money_spent = 12000
    elif years % 2 != 0:
        money_spent = 12000 + 50

if money >= money_spent:
    money_left = money - money_spent
    print(f"Yes! He will live a carefree life and will have {money_left:.2f} dollars left.")
elif money < money_spent:
    money_need = money_spent - money
    print(f"He will need {money_need:.2f} dolllars to survive")