leetcode1375

1 class Solution:
2     def numTimesAllBlue(self, light: 'List[int]') -> int:
3         right,res = 0,0
4         for i, a in enumerate(light, start=1):
5             right = max(right, a)
6             if right == i:
7                 res += 1
8         return res

算法思路：数组。

参考：https://leetcode.com/problems/bulb-switcher-iii/discuss/532538/JavaC%2B%2BPython-Straight-Forward-O(1)-Space