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…

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…

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…

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…

题意:输出出现模式串的id,还是用end记录id就可以了. 本题有个关键点:“以上字符串中字符都是ASCII码可见字符(不包括回车).”  -----也就说AC自动机的Trie树需要128个单词分支. #include <cstdio> #include <cstring> #include <queue> using namespace std; const int maxw = 210 *500 + 10; const int sigma_size = 128; c…

题意:输出每个模式串出现的次数,查询的时候呢使用一个数组进行记录就好. 同上题一样的关键点,其他没什么难度了. #include <cstdio> #include <cstring> #include <queue> using namespace std; const int maxw = 1000 * 50 + 10; const int sigma_size = 128; const int maxl = 2000000 + 10; char str[1010]…

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…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 57353    Accepted Submission(s): 18820 Problem Description In the modern time, Search engine came into the life of everybody li…

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…