caffeine.py

def caffeine(hours):
    sip = hours * (1 - 0.5**(1 / 5))
    gulp = 1 - 0.5**((24 - hours) / 5)
    total = sip + gulp
    print("If you want to maintain a consistent amount of caffeine in your")
    print("blood for {} hours after you wake up, you'll need to drink {:.1%}"
        .format(hours, gulp / total)
    )
    print("of the amount of caffeine you want to drink in a day when you")
    print("wake up, and {:.1%} during the {} hours thereafter, which is about"
        .format(sip / total, hours)
    )
    print("{:.1%} every hour. This will allow you to maintain {:.1%} of the"
        .format(sip / total / hours, 1 / total)
    )
    print("amount of caffeine you want to drink in a day in your blood")
    print("during those {} hours.".format(hours))