LeetCode 231. Power of Two

Description

Given an integer, write a function to determine if it is a power of two.

Code

class Solution {public:    bool isPowerOfTwo(int n) {        if (n<=0) return false;        return ((n & (n-1)) == 0);    }};

Appendix

• Link: https://leetcode.com/problems/power-of-two/
• Run Time: 3ms