题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1381 Crazy Search Description Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number could be t…

Crazy Search Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 26713 Accepted: 7449 Description Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given…

HDU 2222 Keywords Search(查询关键字) Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) [Description] [题目描述] In the modern time, Search engine came into the life of everybody like Google, Baidu, etc. Wiskey also wants to br…

HDU 3157 Crazy Circuits 题目链接 题意:一个电路板,上面有N个接线柱(标号1~N),还有两个电源接线柱 + -.给出一些线路,每一个线路有一个下限值求一个能够让全部部件正常工作的总电流 没有则输出impossible 思路: 有源汇有上下界求最小流,建模方法为: 按无源汇先建图,跑超级源汇ss->tt一次.然后增加t->s,容量INF的边,在跑一次ss->tt,假设是满流.就有解,解为t->s边的当前流量 顺带写个最大流的,最大流就先把t->s增加直接…

Crazy Search Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 3035    Accepted Submission(s): 1133     Problem Description Many people like to solve hard puzzles some of which may lead them to…

Crazy Search Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 32483   Accepted: 8947 Description Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a gi…

                                                    Crazy Search 真是不容易啊,人生第一道hash题竟然是搜博客看题解来的. 题意:给你一个包含m种字符的字符串,求长度为n的不同子串有多少个. 将每个字串化为一个具体的数然后存入数组标记即可,如果重复出现肯定不用再加了.那么怎么化为一个数呢,这里用的方法是先将每个字符对应一个数,然后每个长度为n的子串就有了一个连续的数,将这个数段转化为m进制下的数即可,时间复杂度是O(len).注意…

// hdu 5325 Crazy Bobo // // 题目大意: // // 给你一棵树,树上每一个节点都有一个权值w,选择尽可能多的节点, // 这些节点相互联通,而且依照权值升序排序之后得到节点编号, // 需相邻节点之间的随意节点都要大于较小的节点. // // 解题思路: // 对于每一对u,v,我们建一条这种边:权值小的像权值大的连一条边. // 这样,问题就转化为求以u最小的权值为根的子树上点集的最大值. // dfs就可以. // // // 感悟: // // 多校的一道题目…

A - Crazy Search Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number could be the number of different substrings of a given size that exist…

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…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 51758    Accepted Submission(s): 16671 Problem Description In the modern time, Search engine came into the life of everybody like Google, Baidu,…

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, the…

Crazy Circuits Time Limit: 2000ms Memory Limit: 32768KB This problem will be judged on HDU. Original ID: 315764-bit integer IO format: %I64d      Java class name: Main You’ve just built a circuit board for your new robot, and now you need to power it…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=2222 思路:裸AC自动机,直接贴代码做模板 #include<stdio.h> #include<string.h> #include<malloc.h> #include<queue> using namespace std; +]; struct node { int count; ]; struct node *fail; void init() { int…

题意:给你一些模式串,再给你一串匹配串,问你在匹配串中出现了多少种模式串,模式串可以相同 AC自动机:trie树上进行KMP.首先模式串建立trie树,再求得失配指针(类似next数组),其作用就是在这一位不匹配时转移到失配指针上.失配指针是转移到某个等于此位置最长后缀的位置,求法是bfs #include<set> #include<map> #include<queue> #include<stack> #include<cmath> #in…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3157 You’ve just built a circuit board for your new robot, and now you need to power it. Your robot circuit consists of a number of electrical components that each require a certain amount of current to…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2222 题意:有N(N <= 10000)个长度不超过50的模式串和一个长度不超过1e6的文本串.其中模式串可以重复.问有多少文本串在模式串中出现过.(对于相同的模式串次数仍然累加) 思路:ac自动机裸题: KMP是先将文本串进行匹配得到失配边f[];但是并不适用于文本串较长,模式串较多的情况.因为每次查询的时间复杂度为O(n+m).n,m分别为文本串和模式串的长度: ac自动机就是建立在Trie上,…

点击打开链接题目链接 Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 42838    Accepted Submission(s): 13488 Problem Description In the modern time, Search engine came into the life of eve…

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Crazy Bobo Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others)Total Submission(s): 1077    Accepted Submission(s): 326 Problem Description Bobo has a tree,who…

Crazy Tank Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4562    Accepted Submission(s): 902 Problem Description Crazy Tank was a famous game about ten years ago. Every child liked it. Time f…

题目链接 Description Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number could be the number of different substrings of a given size that exist…

http://acm.hdu.edu.cn/showproblem.php?pid=2222 题意:给出多个单词,最后再给出一个模式串,求在该模式串中包含了多少个单词. 思路: AC自动机的模板题. #include<iostream> #include<algorithm> #include<cstring> #include<cstdio> #include<vector> #include<stack> #include<…

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 t…

题意:一个电路板,上面有N个接线柱(标号1~N)   还有两个电源接线柱  +  - 然后是 给出M个部件正负极的接线柱和最小电流,求一个可以让所有部件正常工作的总电流. 析:这是一个有源汇有上下界的最小流. 有源汇有上下界最大流: 1.构造附加网络 2.对ss.tt求最大流(ss.tt满流则有解) 3.若有解,对s.t求最大流 有源汇有上下界最小流: 1.构造附加网络(不添加[t,s]边) 2.对ss.tt求最大流 3.添加[t,s]边 4.对ss.tt求最大流 5.若ss.tt满流,则[t,…

题目链接:[http://acm.hdu.edu.cn/showproblem.php?pid=2222] 题意:给出很多小字符串,然后给出一个文本串,问文本串中包含多少个小字符串.也就是说如果文本串中出现了多次某个小字符串,则只算一次. 题解:裸的AC自动机,首先利用小字符串建立一个Trie,然后再Trie上做KMP,使得为一个节点具有一个fail指针,其含义是,当文本串在某个节点失配时,则在Trie上找到根节点到这个节点的最长后缀的一个串,然后指向它. 不断地匹配下去就行了. #includ…

题目: POJ最近总是炸 所以还是用HDU吧http://acm.hdu.edu.cn/showproblem.php?pid=3157 题解: 题很长,但其实就是给个有源汇带下界网络流(+是源,-是汇),求最小流 求法: 1.模仿可行流建图,但是不加t到s的INF边 2.跑最大流 3.加t到sINF边 4.跑最大流 5.如果两次答案相加不等于sum,无解; 6.如果有解,t到s的反边流量就是答案 #include<cstdio> #include<algorithm> #incl…

Time Limit: 1000MS   Memory Limit: 65536KB   64bit IO Format: %I64d & %I64u Description Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number…

Keywords Search Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) 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…

题目:http://acm.hdu.edu.cn/showproblem.php?pid=2222 第一道AC自动机! T了无数边后终于知道原来它是把若干询问串建一个自动机,把模式串放在上面跑:而且只走模式串的前缀,用 fail 指针来精准遍历每个前缀的每个后缀,就能行了. #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std…

Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 50451    Accepted Submission(s): 16236 Problem Description In the modern time, Search engine came into the life of everybody lik…