题目链接:https://vjudge.net/problem/POJ-1226 Substrings Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 15122   Accepted: 5309 Description You are given a number of case-sensitive strings of alphabetic characters, find the largest string X,…

Description You are given a number of case-sensitive strings of alphabetic characters, find the largest string X, such that either X, or its inverse can be found as a substring of any of the given strings. Input The first line of the input contains a…

题目大意 给定n个字符串,字符串可逆序可顺序,求它们的最长公共子串 题解 在输入的过程中记录一下最短的那个字符串,然后枚举起点,然后进行二分求出子串末位置,然后再验证是否是公共子串,记录最长的公共子串就是最终答案~~~~时间复杂度为O(N^3*logn) 代码: #include <iostream> #include <algorithm> #include <cstdio> #include <cstring> using namespace std;…

后缀数组. 求多个字符串翻转与否中最长公共子串长. 二分答案,反过来多建一倍的字符串,二分时特判一下即可. By:大奕哥 #include<cstring> #include<cstdio> #include<cstdlib> #include<algorithm> #include<iostream> #define rank fank using namespace std; ; int r[N],wa[N],wb[N],wv[N],wu[N…

题意:给n个字符串,求最长的子串,满足它或它的逆置出现在所有的n个字符串中. 把n个字符串及其它们的逆置拼接,中间用不同字符隔开,并记录suffix(i)是属于哪个字符串的: 跑后缀数组计算height: 二分答案,height分组,看组里面是否都包含了n个字符串的后缀: 注意n=1的情况.. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namesp…

传送门 给定 n 个字符串,求出现或反转后出现在每个字符串中的最长子串. 算法分析: 这题不同的地方在于要判断是否在反转后的字符串中出现.其实这并没有加大题目的难度. 只需要先将每个字符串都反过来写一遍,中间用一个互不相同的且没有出现在字符串中的字符隔开, 再将 n 个字符串全部连起来,中间也是用一个互不相同的且没有出现在字符串中的字符隔开,求后缀数组. 然后二分答案,再将后缀分组. 判断的时候,要看是否有一组后缀在每个原来的字符串或反转后的字符串中出现. 这个做法的时间复杂度为 O(nlogn…

题意: n<=10,len<=100 思路: 只有一个字符串的时候特判一下 #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<iostream> #include<algorithm> #include<map> #include<set> #include<queue> #inclu…

Consider the string s to be the infinite wraparound string of "abcdefghijklmnopqrstuvwxyz", so s will look like this: "...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....". Now we have another string p. Your job is to find…

Consider the string s to be the infinite wraparound string of "abcdefghijklmnopqrstuvwxyz", so s will look like this: "...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....". Now we have another string p. Your job is to find…

Description String analysis often arises in applications from biology and chemistry, such as the study of DNA and protein molecules. One interesting problem is to find how many substrings are repeated (at least twice) in a long string. In this proble…