python3 输入某年某月某日，判断这一天是这一年的第几天？

题目 输入某年某月某日，判断这一天是这一年的第几天？

程序分析 特殊情况，闰年时需考虑二月多加一天。

代码：

import calendar
year = int(input("Year:"))
month = int(input("Month:"))
day = int(input("Day:"))
totalday = 0
if calendar.isleap(year):
    days = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
else:
   days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
for i in range(1, 13):
    if i == month:
        for j in range(1,i):
            totalday = totalday + days[j-1]
totalday = totalday + day
print(totalday)

结果：