题目描述 给出两个串S1,S2(只有大写字母),求S1在S2中出现了多少次. 例如:S1=“ABA”,S2=“ABABA”,答案为2. 输入T组数据,对每组数据输出结果. 输入输出格式 输入格式 第一行为T,表示有T组数据. 接下来分别为每组数据的两个串S1,S2. 输出格式 T行,分别输出每组数据中S1在S2中出现的次数. 每组数据保证S1长度≤10^4,S2长度≤10^6. 输入输出样例 输入样例 3 BAPC BAPC AZA AZAZAZA VERDI AVERDXIVYERDIAN 输…

Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book:Tout avait Pair normal, mais tout s’affirmait faux. Tout avait Fair…

题意:主串中能找到几个模式串 思路:超详细解释KMP KMP:针对这个代码,解释一下Fail数组的含义:T为主串,P为模式串,Fail代表失配值,即当P[j] != T[i]时,j要指向的位置为Fail[j],当Fail为-1时表示i指针后移.如果使用这个代码,Fail[j]的值的含义为P[0]…P[j-1]这个子串的前后缀匹配度,但是下面代码的不是!!! 代码: #include<iostream> #include<algorithm> const int N = 100000…

http://poj.org/problem?id=3461 KMP板子,好久以前学过了,直接把板子粘上去即可. #include<cstdio> #include<cstring> using namespace std; ]; ]; ]={}; void getnext(int m){ ; ;i<=m;i++){ &&s2[j+]!=s2[i])j=nxt[j]; ]==s2[i])j++; nxt[i]=j; } return; } int ans; v…

本题就是给出非常多对字符串,然后问一个字符串在另外一个字符串出现的次数. 就是所谓的Strstr函数啦. Leetcode有这道差点儿一模一样的题目. 使用KMP算法加速.算法高手必会的算法了. 另外看见讨论说什么使用KMP还超时,最大可能是没有真正理解next table的含义,写了错误的代码,故此尽管自己执行结果正确,可是却没有真正发挥next table的作用.使得算法退化为暴力法了,所以执行正确,但超时. KMP參考: http://blog.csdn.net/kenden23/arti…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题目大意:给你一个子串t和一个母串s,求s中有多少个子串t. 题目分析:KMP模板题. cal_next() :计算字符串t的nxt函数: find_s_has_t_count() :计算s中包含多少个t. 实现代码如下: #include <cstdio> #include <string> using namespace std; const int maxn = 10010…

Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 35694   Accepted: 14424 Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quot…

POJ 3461 Oulipo(乌力波) Time Limit: 1000MS   Memory Limit: 65536K [Description] [题目描述] The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book: Tou…

Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 23667   Accepted: 9492 Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote…

题面 The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book: Tout avait Pair normal, mais tout s'affirmait faux. Tout avait Fair normal, d'abord,…