numbstorm的博客

题目描述：   Design a data structure that supports the following two operations:   void addWord(word)   bool search(word) search(word) can search a literal word or a regular expression string contain

题目描述： Implement a trie(单词查找树:利用字符串的公共前缀来节约存储空间) with insert, search, and startsWith methods. Note:   You may assume that all inputs are consist of lowercase letters a-z. 思路:全在注释里。 public class Im