用Python编写一个程序

import math
time = input("请输入上网时间：")
money = 0
time =float(time)
if time < 10:
    money = 30
elif 10<=time<50:
    money = 30 + 2.5 * math.ceil(time - 10)
elif time >=50:
    money = 30 + 2.5 * (50 - 10) + 2 * math.ceil(time - 50)
if money > 150:
    money = 150.0
print("上网费用：{}".format(money))