【题解】1154.一年中的第几天

# Python3

# Author: duzhenwei

class Solution:

    def dayOfYear(self, date: str) -> int:

        # 拆分字符串

        date = list(map(int, date.split('-')))

        # 每个月的天数

        days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

        # 按照平年计算天数

        res = date[2]

        for i in range(date[1] - 1):

            res += days[i]

        # 判断是否是平年，若是则直接返回，若否则先加 1 再返回

        if date[1] < 3 or (date[0] % 100 == 0 and date[0] % 400 != 0) or (date[0] % 4 != 0):

            return res

        return res + 1