后缀自己主动机裸题.... Longest Common Substring Time Limit: 2000MS   Memory Limit: Unknown   64bit IO Format: %lld & %llu [Submit]   [Go Back]   [Status]   Description A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ…

[SPOJ]Longest Common Substring II (后缀自动机) 题面 Vjudge 题意:求若干个串的最长公共子串 题解 对于某一个串构建\(SAM\) 每个串依次进行匹配 同时记录\(f[i]\)表示走到了\(i\)节点 能够匹配上的最长公共子串的长度 当然,每个串的\(f[i]\)可以更新\(f[i.parent]\) 所以需要拓扑排序 对于每个串求出每个节点的最长匹配 然后对他们取\(min\),表示某个节点大家都能匹配的最长长度 最后对于所有点的值都取个\(max\)…

[SPOJ]Longest Common Substring(后缀自动机) 题面 Vjudge 题意:求两个串的最长公共子串 题解 \(SA\)的做法很简单 不再赘述 对于一个串构建\(SAM\) 另外一个串在\(SAM\)上不断匹配 最后计算答案就好了 匹配方法: 如果\(trans(s,c)\)存在 直接沿着\(trans\)走就行,同时\(cnt++\) 否则沿着\(parent\)往上跳 如果存在\(trans(now,c),cnt=now.longest+1\) 否则,如果不存在可行的…

[SPOJ]Longest Common Substring II 多个字符串求最长公共子串 还是将一个子串建SAM,其他字符串全部跑一边,记录每个点的最大贡献 由于是所有串,要对每个点每个字符串跑完后去最小值才是每个点的最终贡献 #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm…

[SPOJ]Longest Common Substring 求两个字符串的最长公共子串 对一个串建好后缀自动机然后暴力跑一下 废话 讲一下怎么跑吧 从第一个字符开始遍历,遍历不到了再沿着\(parents\)走看能否找到出路,走到某个点时,统计一下走过了多少点然后更新答案 来说说这样做的正确性: 遍历是肯定的, SAM 从根节点出发的任意路径都表示一个子串 沿着\(parents\)边往后走,保证贪心情况下维护最长公共子串寻找出路 注意这里是统计走过了多少点更新答案,不能直接通过\(len\)…

A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ is the set of lowercase letters. Substring, also called factor, is a consecutive sequence of characters occurrences at least once in a string. Now your task i…

LCS2 - Longest Common Substring II A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ is the set of lowercase letters. Substring, also called factor, is a consecutive sequence of characters occurrences at leas…

LCS - Longest Common Substring no tags  A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ is the set of lowercase letters. Substring, also called factor, is a consecutive sequence of characters occurrences at…

A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ is the set of lowercase letters. Substring, also called factor, is a consecutive sequence of characters occurrences at least once in a string. Now your task i…

1811. Longest Common Substring Problem code: LCS A string is finite sequence of characters over a non-empty finite set Σ. In this problem, Σ is the set of lowercase letters. Substring, also called factor, is a consecutive sequence of characters occur…