摘要： Determine whether an integer is a palindrome. Do this without extra space.尝试用两头分别比较的方法，结果发现无法解决1000021这种问题 1 public class Solution { 2 public bool... 阅读全文

摘要： Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321一次通过，它的spoiler里面的提示有两个：1. 末尾为0的情况，这个考虑到了2.Did you notice that... 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