摘要：
Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Exampl 阅读全文
摘要：
Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Example 2: Example 3: 阅读全文
摘要：
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font 阅读全文
摘要：
集体右移：选中代码，按tab键 集体左移：选中代码，按shift+tab键 阅读全文
摘要：
Given a 32-bit signed integer, reverse digits of an integer. Example 1: Example 2: Example 3: 题意： 给定一个10进制整数，翻转它。 Solution1: directly do the simulatio 阅读全文