CF1090J Two Prefixes】的更多相关文章

神仙题++ 还是在某校梁大讲的题qaq 我们考虑容斥 也就是本质不同字串=全部-重复的 我们只需要求重复的即可 考虑相同的s=ab 我们用长度最长的a作为代表串 如果存在一个a'b'且|a'|>|a| 分析可以知道必然有b'是b的border 如图 那么显然我们存在b的最长border b''使a''b''=ab 这个可以kmp求得f[i]为border 然后我们在考虑b的一段前缀在a中出现的次数 那么我们可以通过exkmp求得g[i]表示以i开头的最长长度 然后接下来反向前缀和更新即可 一个方…
Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 17683   Accepted: 7686 Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", &qu…
Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", "ca", "car", "carb", "carbo", and "carbon". Note that t…
Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 12731   Accepted: 5442 Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", &qu…
Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 16782   Accepted: 7286 Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", &qu…
1.链接地址: http://bailian.openjudge.cn/practice/2001 http://poj.org/problem?id=2001 2.题目: Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 12208   Accepted: 5210 Description A prefix of a string is a substring starting at t…
Shortest Prefixes 题意:输入不超过1000个字符串,每个字符串为小写字母,长度不超过20:之后输出每个字符串可以简写的最短前缀串: Sample Input carbohydrate cart carburetor caramel caribou carbonic cartilage carbon carriage carton car carbonate Sample Output carbohydrate carboh (carbo不止一个字符串含有,所以不能作为简写符号)…
转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud D. Prefixes and Suffixes You have a string s = s1s2...s|s|, where |s| is the length of string s, and si its i-th character. Let's introduce several definitions: A substring s[i..j] (1 ≤ i ≤ j…
Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 15948   Accepted: 6887 Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", &qu…
题目连接:Codeforces 432D Prefixes and Suffixes 题目大意:给出一个字符串,求全部既是前缀串又是后缀串的字符串出现了几次. 解题思路:依据性质能够依据KMP算法求出全部的前后缀串,然后利用dp求解,dp[i]表示从1到i这个子串出现过的次数. 转移方程dp[jump[i]]+=dp[i]. 随意一个dp[i]的初始状态应该是1. #include <cstdio> #include <cstring> const int N = 1e5+5; i…