12 2018 档案

摘要：Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A. You may re 阅读全文

摘要：Given an integer, write a function to determine if it is a power of two. Example 1: Example 2: Input: 5 Output: false判断一个数是否为2的次幂，偶然发现3年前做这道题就是很简单的循环对 阅读全文