Back to the Past

money = float(input())
year_live = int(input())
years = 18

for i in range(1800, year_live + 1):
  if i % 2 == 0:
    money -= 12000
    years += 1
  else:
    money -= (12000 + years * 50)
    years += 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.")