题意: 问母串中出现多少个模式串 注意ac自动机的节点总数 #include <stdio.h> #include <string.h> #include <queue> using namespace std; inline int Max(int a,int b){return a>b?a:b;} inline int Min(int a,int b){return a>b?b:a;} int ANS; #define N 1000010 #define…

题目: http://acm.hdu.edu.cn/showproblem.php?pid=2222 AC自动机模板题 我现在对AC自动机的理解还一般,就贴一下我参考学习的两篇博客的链接: http://blog.csdn.net/niushuai666/article/details/7002823 http://www.cppblog.com/menjitianya/archive/2014/07/10/207604.html #include<stdio.h> #include<s…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 59827    Accepted Submission(s): 19715 Problem Description In the modern time, Search engine came into the life of everybody lik…

所学的AC自动机都源于斌哥和昀神的想法. 题意:求目标串中出现了几个模式串. 使用一个int型的end数组记录,查询一次. #include <cstdio> #include <cstring> #include <queue> using namespace std; const int maxw = 50 * 10000 + 10; const int sigma_size = 26; const int maxl = 1000000 + 10; struct T…

中文题题意不再赘述 注意 失配数组 f  初始化一步到位 #include <stdio.h> #include <string.h> #include <queue> using namespace std; #define N 2000100 #define maxnode 50010 #define sigma_size 26 struct node{ char name[55]; int num; }S[1101]; struct Trie{ int ch[ma…

中文题题意不再赘述 注意字符范围是可见字符,从32开始到95 char c - 32 #include <stdio.h> #include <string.h> #include <queue> #include <algorithm> using namespace std; inline int Max(int a,int b){return a>b?a:b;} inline int Min(int a,int b){return a>b?…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 70290    Accepted Submission(s): 23917 Problem Description In the modern time, Search engine came into the life of everybody lik…

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 find the image, th…

HDU 2222 Keywords Search 模板题.对模式串建立AC自动机然后在trie树上找一遍目标串即可. # include <cstdio> # include <cstring> # include <cstdlib> # include <iostream> # include <vector> # include <queue> # include <stack> # include <map&g…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=3065 题目大意:多个模式串,范围是大写字母.匹配串的字符范围是(0~127).问匹配串中含有哪几种模式串,且每种模式串出现了多少次. 解题思路: AC自动机模板题.模式串的范围是大写字母,但是匹配串的范围却是(0~127). 如果Trie 开到 128 加上不回收内存,就会MLE. 实际上开到26就行了,find的时候对于c<0||c>26,强制令pos=root出现失配,并开始下一个字符就行了…