摘要：
Power of TwoGiven an integer, write a function to determine if it is a power of two.https://leetcode.com/problems/power-of-two/二分。2的整数次幂，要么开方后是整数(这个数也... 阅读全文
摘要：
Largest NumberGiven a list of non negative integers, arrange them such that they form the largest number.For example, given[3, 30, 34, 5, 9], the larg... 阅读全文