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[Swift]LeetCode1118. 一月有多少天 | Number of Days in a Month

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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:

  1. 1583 <= Y <= 2100
  2. 1 <= M <= 12

指定年份 Y 和月份 M,请你帮忙计算出该月一共有多少天。 

示例 1:

输入:Y = 1992, M = 7
输出:31

示例 2:

输入:Y = 2000, M = 2
输出:29

示例 3:

输入:Y = 1900, M = 2
输出:28 

提示:

  1. 1583 <= Y <= 2100
  2. 1 <= M <= 12

4ms

 1 class Solution {
 2     func numberOfDays(_ Y: Int, _ M: Int) -> Int {
 3         if Y % 400 == 0 || (Y % 100 != 0 && Y % 4 == 0)
 4         {
 5             if M == 2 {return 29}
 6         }
 7         let mon:[Int] = [31,28,31,30,31,30,31,31,30,31,30,31]
 8         return mon[M - 1]
 9     }
10 }

 

posted @ 2019-07-13 09:59  为敢技术  阅读(551)  评论(0编辑  收藏  举报