【leetcode】1154. Day of the Year

题目如下：

Given a string date representing a Gregorian calendar date formatted as YYYY-MM-DD, return the day number of the year.

Example 1:
Input: date = "2019-01-09"

Output: 9

Explanation: Given date is the 9th day of the year in 2019.
Example 2:
Input: date = "2019-02-10"

Output: 41
Example 3:
Input: date = "2003-03-01"

Output: 60
Example 4:
Input: date = "2004-03-01"

Output: 61
Constraints:

date.length == 10

date[4] == date[7] == '-', and all other date[i]'s are digits

date represents a calendar date between Jan 1st, 1900 and Dec 31, 2019.

解题思路：题目很简单，注意区分闰年和平年即可。

代码如下：

class Solution(object):

    def dayOfYear(self, date):

        """

        :type date: str

        :rtype: int

        """

        date = date.split('-')

        year = date[0]

        def isLeapYear(year):

            return (year % 4) == 0 and (year % 100) != 0 or (year % 400) == 0

        month_list = [31,28,31,30,31,30,31,31,30,31,30,31]

        if isLeapYear(int(year)):

            month_list[1] += 1

        month = int(date[1])

        return sum(month_list[:month-1]) + int(date[2])

巴特西

【leetcode】1154. Day of the Year

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