juary_的专栏

Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two numbers such that they add up to the target, where

Code Gankerblog.youkuaiyun.com/linhuanmars?viewmode=contentsGrandyangwww.cnblogs.com/grandyang/p/4606334.htmlAcm之家www.acmerblog.comelton_xiaoblog.youkuaiyun.com/elton_xiao/article/category/2

一：概念首先简要介绍一下AC自动机：Aho-Corasick automation，该算法在1975年产生于贝尔实验室，是著名的多模匹配算法之一。一个常见的例子就是给出n个单词，再给出一段文章（长度是m），让你找出有多少个单词在文章里出现过。要搞懂AC自动机，先得有字典树Trie的基础知识（也有人说需要KMP的知识，我觉得暂且不要理会这个。但是在看这篇文章之前，Trie字典树，你是必须要先