Given a year Y and a month M, return how many days there are in that month.
Example 1:
Input: Y = 1992, M = 7 Output: 31
Example 2:
Input: Y = 2000, M = 2 Output: 29
Example 3:
Input: Y = 1900, M = 2 Output: 28
Note:
1583 <= Y <= 21001 <= M <= 12