AC自动机模板题. 被卡内存了 死活A不掉.. AC自动机参考教程: http://www.cppblog.com/menjitianya/archive/2014/07/10/207604.html ; type arr=record next:..] of longint; fail,cnt:longint; end; var cas:longint; s:..maxn] of string; T:..] of arr; id:array['a'..'z'] of longint; rt,t…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 27138    Accepted Submission(s): 8871 Problem Description In the modern time, Search engine came into the life of everybody like…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 48520    Accepted Submission(s): 15473 Problem Description In the modern time, Search engine came into the life of everybody lik…

AC自动机模板,注意!ch,Fail,lab数组的大小不是n而是节点个数,需要认真计算! #include <iostream> #include <algorithm> #include <cstdio> #include <cstring> #include <cmath> #include <ctime> #include <cstdlib> #include <queue> using namespac…

ac自动机说起来很复杂,其实和kmp是一样的思路,都是寻找相同前后缀,减少跳的次数.只要理解了kmp是怎么求next数组的,ac自动机bfs甚至比knp还好写. 这里大致说一下kmp求next数组的方法吧,假设现在要求第c个字符的next值(假设这个c很大,这样画图出来比较清晰方便理解),因为遍历过程中我们已经知道了第c-1个字符的next为x(假设比c小很多),即next[c-1] = x.那就代表我们知道了a[1]—a[x]这一段和a[c-1-x]—a[c-1]这一段是相等的对吧. 那么现在…

题意:一个文本串+多个模板串的匹配问题 思路:裸的ac自动机. #pragma comment(linker, "/STACK:10240000,10240000") #include <iostream> #include <cstdio> #include <algorithm> #include <cstdlib> #include <cstring> #include <map> #include <…

字典树也可以做. #include<stdio.h> #include<string.h> #include<stdlib.h> #define maxn 1000010 struct ac_mation { ac_mation *fail;//失败指针 ac_mation *next[];//26个字母 int flag;//标记是否为最后一个点 init(){//函数初始化 flag=; fail=NULL; ;i<;i++) next[i]=NULL; }…

#include<iostream> #include<cmath> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef long long ll; *+; struct node{ ],f,v,cnt; ,;} }ch[maxn]; ],t[]; int tot,q[maxn],head,tail,T,n; void add(ch…

[HDU2222]Keywords Search Problem Description In the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bring this feature to his image retrieval system.Every image have a long description, when use…

Problem Description In the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bring this feature to his image retrieval system.Every image have a long description, when users type some keywords to…