点此看题面 大致题意: 给你一个文本串和\(N\)个模式串,要你将每一个模式串从文本串中删去.(此题是[BZOJ3942][Usaco2015 Feb]Censoring的升级版) \(AC\)自动机 这是一道\(AC\)自动机的简单运用题. 题解 我们可以用一个\(ans[\) \(]\)字符数组来存储最后的答案,并用一个\(lst[\) \(]\)数组来记录字符串中每一位上次被访问时所到达的\(Trie\)上的节点. 如果找到了一个长度为\(len\)的模式串要删去,我们可以将\(ans\)…

[题目描述] FJ把杂志上所有的文章摘抄了下来并把它变成了一个长度不超过10^5的字符串S.他有一个包含n个单词的列表,列表里的n个单词 记为t_1...t_N.他希望从S中删除这些单词.  FJ每次在S中找到最早出现的列表中的单词(最早出现指该单词的开始位置最小),然后从S中删除这个单词.他重复这个操作直到S中 没有列表里的单词为止.注意删除一个单词后可能会导致S中出现另一个列表中的单词  FJ注意到列表中的单词不会出现一个单词是另一个单词子串的情况,这意味着每个列表中的单词在S中出现的开始位…

题目描述 Farmer John has purchased a subscription to Good Hooveskeeping magazine for his cows, so they have plenty of material to read while waiting around in the barn during milking sessions. Unfortunately, the latest issue contains a rather inappropria…

[BZOJ3942][Usaco2015 Feb]Censoring Description Farmer John has purchased a subscription to Good Hooveskeeping magazine for his cows, so they have plenty of material to read while waiting around in the barn during milking sessions. Unfortunately, the…

[题目大意] 有一个S串和一个T串,长度均小于1,000,000,设当前串为U串,然后从前往后枚举S串一个字符一个字符往U串里添加,若U串后缀为T,则去掉这个后缀继续流程. [样例输入] whatthemomooofun moo [样例输出] whatthefun     [题解] 我能说这是可持久化的kmp吗?(并没有此种术语) kmp的过程中,用一个栈来存当前U串,如果匹配到了,弹出即可,然后j指针有恢复到历史的状态,这个状态可以用f数组来存. #include<iostream> #in…

[BZOJ3943][Usaco2015 Feb]SuperBull Description Bessie and her friends are playing hoofball in the annual Superbull championship, and Farmer John is in charge of making the tournament as exciting as possible. A total of N (1 <= N <= 2000) teams are p…

[BZOJ3939][Usaco2015 Feb]Cow Hopscotch Description Just like humans enjoy playing the game of Hopscotch, Farmer John's cows have invented a variant of the game for themselves to play. Being played by clumsy animals weighing nearly a ton, Cow Hopscotc…

[BZOJ3943][Usaco2015 Feb]SuperBull Description Bessie and her friends are playing hoofball in the annual Superbull championship, and Farmer John is in charge of making the tournament as exciting as possible. A total of N (1 <= N <= 2000) teams are p…

[题目大意] 有一个S串和一个T串,长度均小于1,000,000,设当前串为U串,然后从前往后枚举S串一个字符一个字符往U串里添加,若U串后缀为T,则去掉这个后缀继续流程.输出最后的S串. [思路]三天前写过一次,用的是以前的KMP模板,但是觉得太乱了,数组下标一会儿是下标一会儿是长度,傻傻分不清.参照其他人常见的方法重改了一发,算是比较清晰的KMP了,所有数组下标均直接指代字符串下标. 维护两个同进同出的栈,s代表当前的U串,a代表在s串种相应位置时的j指针位于模式串中的下标.每次将匹配串的下…

题目描述 Bessie and her friends are playing hoofball in the annual Superbull championship, and Farmer John isin charge of making the tournament as exciting as possible. A total of N (1 <= N <= 2000) teams areplaying in the Superbull. Each team is assign…