from cs50 import get_float

while True:
    cents = get_float("Change: ")
    if cents > 0:
        break

quarters = cents // 25
cents -= quarters * 0.25

dimes = cents // 10
cents -= dimes * 0.10

nickels = cents // 5
cents -= nickels * 0.05

pennies = cents // 1
cents -= pennies * 0.01

coins = quarters + dimes + nickels + pennies
print(coins)