342 power of four

作者: larrymusk | 来源:发表于2017-11-20 22:50 被阅读0次

首先是power of two, 然后奇数位是1的都不是，比如10, 1000

4 : 1(1), 4(100), 16(10000),

bool isPowerOfFour(int num) {
    
    return num>0 && !(num&0xAAAAAAAA) && !(num&(num-1));
    
}

2019-04-08
LeetCode 342. Power of Four Description Given an integer ...
342 power of four
首先是power of two, 然后奇数位是1的都不是，比如10, 1000 4 : 1(1), 4(100),...
342. Power of four
Problem Given an integer (signed 32 bits), write a functi...
342. Power of Four
题目分析题目链接，登录 LeetCode 后可用这道题目要求判断一个数是不是 4 的次方数，思路比较简单，先判断...
342. Power of Four
1.描述 Given an integer (signed 32 bits), write a function ...
[LeetCode 342]Power of Four
Given an integer (signed 32 bits), write a function to ch...
342. Power of Four
Given an integer (signed 32 bits), write a function to ch...
LeetCode 342 [Power of Four]
原题给出一个整数 (32 位), 写出一个函数判断它是不是4的次方数样例:给出 num = 16, 返回 tr...
342. Power of Four
342. Power of Four
Given an integer (signed 32 bits), write a function to ch...