摘要：
Given an integer array with even length, where different numbers in this array represent different kinds of candies. Each number means one candy of th 阅读全文
摘要：
Write a function that takes a string as input and returns the string reversed. Example:Given s = "hello", return "olleh" 思路：直接转StringBuffer后reserve即可； 阅读全文
摘要：
Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. E 阅读全文