1154. Day of the Year

https://leetcode.com/problems/day-of-the-year

Description

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.

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