Computer Virus on Planet Pandora Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 256000/128000 K (Java/Others)Total Submission(s): 2975    Accepted Submission(s): 833 Problem Description     Aliens on planet Pandora also write computer progra…

题目连接:hdu 3695 Computer Virus on Planet Pandora 题目大意:给定一些病毒串,要求推断说给定串中包括几个病毒串,包括反转. 解题思路:将给定的字符串展开,然后匹配一次后反转后再匹配一次. #include <cstdio> #include <cstring> #include <queue> #include <vector> #include <iostream> #include <algor…

Computer Virus on Planet Pandora Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 256000/128000 K (Java/Others)Total Submission(s): 2578    Accepted Submission(s): 713 Problem Description     Aliens on planet Pandora also write computer progra…

Computer Virus on Planet Pandora Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 256000/128000 K (Java/Others) Total Submission(s): 4090    Accepted Submission(s): 1072 Problem Description     Aliens on planet Pandora also write computer prog…

Problem's Link Mean: 有n个模式串和一篇文章,统计有多少模式串在文章中出现(正反统计两次). analyse: 好久没写AC自动机了,回顾一下AC自动机的知识. 本题在构造文章的时候需要仔细一点,其他没什么Trick,和普通AC自动机做法一样: build Trie  --->  build Fail_Ptr ---> matching_and_count Time complexity: O(N*L+M) Source code:  /* * this code is m…

题意:有n种病毒序列(字符串),一个模式串,问这个字符串包括几种病毒. 包括相反的病毒也算.字符串中[qx]表示有q个x字符.具体见案列. 0 < q <= 5,000,000尽然不会超,无解 3 2 AB DCB DACB 3 ABC CDE GHI ABCCDEFIHG 4 ABB ACDEE BBB FEEE A[2B]CD[4E]F   Sample Output 0 3 2 Hint In the second case in the sample input, the revers…

题目大意 给定一个文本串T,然后给定n个模式串,问有多少个模式串在文本串中出现,正反都可以 题解 建立好自动机后.把文本串T正反各匹配一次,刚开始一直TLE...后面找到原因是重复的子串很多以及有模式串是另外一个模式串的子串这种情况也很多~~~,所以我们用数组标记一下就好了~~~改了交上去之后是WA,最后发现时visit数组初始化错地方了.... 代码: #include <iostream> #include <cstring> #include <algorithm>…

题意 问一个字符串中包含多少种模式串,该字符串的反向串包含也算. 思路 解析一下字符串,简单. 建自动机的时候,通过fail指针建立trie图.这样跑图的时候不再跳fail指针,相当于就是放弃了fail指针. 跑的时候,已经走过的模式串不能二次计数. 代码 附赠一大波样例 #include <iostream> #include <stdio.h> #include <queue> #include <string.h> using namespace st…

F - Computer Virus on Planet Pandora Time Limit:2000MS     Memory Limit:128000KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 3695 Appoint description:  System Crawler  (2014-11-05) Description     Aliens on planet Pandora also write…

  Computer Virus on Planet Pandora Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 1353   Accepted: 256 Description Aliens on planet Pandora also write computer programs like us. Their programs only consist of capital letters (‘A’ to ‘Z’…