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摘要: AC自动机是用来干什么的: AC自动机是用来解决多模匹配问题,例如有单词s1,s2,s3,s4,s5,s6,问:在文本串ss中有几个单词出现过,类似。 AC自动机实现这个功能需要三个部分: 1、将所有单词用字典树的方法建树 2、构建失配指针 3、在文本串中的查找函数 这里主要讲2和3 一、建树 二、 阅读全文
posted @ 2019-08-04 22:33 知道了呀~ 阅读(635) 评论(0) 推荐(0)
摘要: Stall Reservations Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 15069 Accepted: 5270 Special Judge Description Oh those picky N (1 <= N 阅读全文
posted @ 2019-08-04 16:21 知道了呀~ 阅读(202) 评论(0) 推荐(0)
摘要: Stall Reservations Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 15069 Accepted: 5270 Special Judge Description Oh those picky N (1 <= N 阅读全文
posted @ 2019-08-04 16:21 知道了呀~ 阅读(302) 评论(0) 推荐(0)
摘要: Fence Repair Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 72404 Accepted: 23764 Description Farmer John wants to repair a small length o 阅读全文
posted @ 2019-08-04 11:11 知道了呀~ 阅读(520) 评论(0) 推荐(0)
摘要: 哈夫曼编码(Huffman Coding),又称霍夫曼编码,是一种编码方式,可变字长编码(VLC)的一种。Huffman于1952年提出一种编码方法,该方法完全依据字符出现概率来构造异字头的平均长度最短的码字,有时称之为最佳编码,一般就叫做Huffman编码(有时也称为霍夫曼编码)。 哈夫曼编码,主 阅读全文
posted @ 2019-08-04 10:56 知道了呀~ 阅读(84907) 评论(0) 推荐(5)
摘要: Saruman's Army Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 18794 Accepted: 9222 Description Saruman the White must lead his army along 阅读全文
posted @ 2019-08-03 21:46 知道了呀~ 阅读(313) 评论(0) 推荐(0)
摘要: Best Cow Line Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 42701 Accepted: 10911 Description FJ is about to take his N (1 ≤ N ≤ 2,000) c 阅读全文
posted @ 2019-08-03 21:12 知道了呀~ 阅读(236) 评论(0) 推荐(0)
摘要: Hopscotch Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6761 Accepted: 4354 Description The cows play the child's game of hopscotch in a 阅读全文
posted @ 2019-08-03 17:38 知道了呀~ 阅读(215) 评论(0) 推荐(0)
摘要: Backward Digit Sums Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 10772 Accepted: 6068 Description FJ and his cows enjoy playing a mental 阅读全文
posted @ 2019-08-03 16:03 知道了呀~ 阅读(254) 评论(0) 推荐(0)
摘要: Smallest Difference Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 19528 Accepted: 5329 Description Given a number of distinct decimal dig 阅读全文
posted @ 2019-08-03 14:59 知道了呀~ 阅读(277) 评论(0) 推荐(0)
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