319. 灯泡开关

Posted on 2021-11-16 Edited on 2022-11-27 In leetcode Disqus:
Symbols count in article: 101 Reading time ≈ 1 mins.

迭代

class Solution {
public:
    int bulbSwitch(int n) {
        return sqrt(n + 0.5);
    }
};