摘要：Determine whether an integer is a palindrome. Do this without extra space. 方法一： 思路： 判断一个整数是否为回文结构与Reverse Integer思路几乎相同，稍微修改即可。 方法二： 思路：将x转化为字符串再翻转，再将 阅读全文

摘要：Given a 32-bit signed integer, reverse digits of an integer. Example 1: Example 2: Example 3: Note:Assume we are dealing with an environment which cou 阅读全文

摘要：Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文