backtothepast

money = float(input())
last_year = int(input())
year = 18
for years in range(1800, last_year + 1):
    if years % 2 == 0:
        money -= 12000
    else:
        money -= (12000 + 50 * year)
    year +=1
if money >=0:
    print(f'Yes! He will live a carefree life and will have {money:.2f} dollars left.')
else:
    print(f'He will need {abs(money):.2f} dollars to survive.')