给定一个二进制数组，找出该数组中最大连续1的个数。
Example 1:
Input: [1,1,0,1,1,1]
Output: 3
Explanation: The first two digits or the last three digits are consecutive 1s.
The maximum number of consecutive 1s is 3.
Example 2:
Input: [1]
Output: 1
原文：https://www.cnblogs.com/yunxintryyoubest/p/12731160.html