while True:
    try:
        change = float(input("Change: "))
        if change > 0:
            break
    except:
        ValueError


cents = int(change * 100)

quarters = int(cents / 25)
cents = cents % 25

dimes = int(cents / 10)
cents = cents % 10

nickels = int(cents / 5)

pennies = int(cents % 5)

cents = int(quarters + dimes + nickels + pennies)

print(cents)