摘要： 题目： Write a function to find the longest common prefix string amongst an array of strings. 链接：http://leetcode.com/problems/longest-common-prefix/ 一刷： 阅读全文

摘要： 题目： Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindro 阅读全文