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…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题目大意:给两个字符串A,B求出A中出现了几次B(计算重复部分). 解题思路:稍微对kmp()函数进行修改,当j==m时,使得j=nxt[j].类似地有HDU 2087题意相似,但是不计算重复部分,在j==m时,使j=0即可. 代码 #include<iostream> #include<cstdio> #include<cstring> #include<al…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题目大意:寻找子链在母链中出现的次数. #include <iostream> #include <cstdio> #include <cstring> using namespace std; ],sum,lens,lenc; ],ch[]; int get_next() { ,j=-; next[]=-; while (i<strlen(str)) { ||…

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…

题目链接:https://vjudge.net/contest/220679#problem/B 题目大意: 输入一个T,表示有T组测试数据: 每组测试数据包括一个字符串W,T,T长度大于W小于1000000,w长度小于10000,计算W匹配到T中成功的次数: 需要注意的是: 第一次将匹配成功的位置得到后,若从匹配到的位置开始算起,会超时,实际上没必要,每次模式串匹配成功时,都将个数+1,然后从next数组的下一位继续开始匹配,直至待匹配串结束 代码如下:实际上就是将kmp裸题稍微改一下. 若两…

一开始总是超时,后来发现还是方法没找对,这个跟普通KMP不太一样的就是,KMP匹配成功的时候会完全跳过已经匹配成功的匹配段,至少我掌握的是.那么如何避免这样的问题呢,举个栗子啊 原串为ABABA,模式串为ABA,当匹配成功的时候,只要跳转到模式串最大公共前后缀长度就行了,ABA的长度为1,所以就是从原串的第二个B开始进行匹配,这样就不会漏了,记录所有匹配成功的次数就是答案. #include<iostream> #include<cstdio> #include<cstrin…

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, pu…

HDU 1686 Oulipo / POJ 3461 Oulipo / SCU 2652 Oulipo (字符串匹配,KMP) 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…

id=25191" target="_blank" style="color:blue; text-decoration:none">HDU - 1686 Oulipo Time Limit: 1000MS   Memory Limit: 32768KB   64bit IO Format: %I64d & %I64u id=25191" class="login ui-button ui-widget ui-state-…

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…

kmp算法可参考 kmp算法 汇总 #include <bits/stdc++.h> using namespace std; const int maxn=1000000+5; const int maxm=10000+5; char T[maxn],W[maxm]; void kmp_pre(char x[],int m,int nextp[]) { //自身与自身进行匹配 int i,j; i=0; j=nextp[0]=-1; while(i<m) { while(j!=-1 &…

题目地址:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题目: 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…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 分析:典型的KMP算法,统计字符串匹配的次数. 用Next数组压缩时间复杂度,要做一些修改. /*Oulipo Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5769 Accepted Submission(s): 2322 Proble…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter…

HDU题目 POJ题目 求目标串s中包含多少个模式串p KMP算法,必须好好利用next数组,, (kmp解析)——可参考 海子的博客  KMP算法 //写法一: #include<string> #include <stdio.h> #include <iostream> #include <algorithm> #include <string.h> using namespace std; void getNext(char *p,int…

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…

题目链接 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…

Oulipo Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 21428    Accepted Submission(s): 8324 Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, wi…

Oulipo Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 17441    Accepted Submission(s): 6938 Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, wi…

HDU-1686 P3375 kmp介绍: http://www.matrix67.com/blog/archives/115 http://www.cnblogs.com/SYCstudio/p/7194315.html http://blog.chinaunix.net/uid-8735300-id-2017161.html(mp&kmp) http://www-igm.univ-mlv.fr/~lecroq/string/node8.html(mp&kmp,看上去很正确的例程) ht…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题意 查询字符串 $p$ 在字符串 $s$ 中出现了多少次,可重叠. 题解 KMP模板题. Tips 需要关闭流同步,否则会超时. 代码 #include <bits/stdc++.h> using namespace std; const int N = 1e6 + 100; int Next[N]; string s, p; void init_Next() { Next[0] =Nex…

Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 16166    Accepted Submission(s): 6444 Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without t…

传送门 Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 32373   Accepted: 13093 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…

// hdu 1686 KMP模板 // 没啥好说的,KMP裸题,这里是MP模板 #include <cstdio> #include <iostream> #include <cstring> #include <algorithm> using namespace std; ; ; char T[MAX_N]; char p[MAX_M]; int f[MAX_M]; int n,m; void getfail(){ f[] = f[] = ; ;i&l…

Problem Description People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Coins with values of all square numbers up to 289 (=17^2), i.e., 1-credit coins, 4-credit coins, 9-credit coins, ...…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2069 Problem Description Suppose there are 5 types of coins: 50-cent, 25-cent, 10-cent, 5-cent, and 1-cent. We want to make changes with these coins for a given amount of money.For example, if we have 11…

Problem Description "Well, it seems the first problem is too easy. I will let you know how foolish you are later." feng5166 says."The second problem is, given an positive integer N, we define an equation like this:  N=a[1]+a[2]+a[3]+...+a[m…

来刷kuangbin字符串了,字符串处理在ACM中是很重要的,一般比赛都会都1——2道有关字符串处理的题目,而且不会很难的那种,大多数时候都是用到一些KMP的性质或者找规律. 点击标题可跳转至VJ比赛题目链接. A - Number Sequence 题意就是让你去找在串A找串B首次出现的位置,现在串不是字符串,而是数字串,所以用int数组存储即可,然后就是裸KMP. 代码: #include <string> #include <algorithm> #include <i…

题意 : 给出两个字符串,现在需要求一个和sum,考虑第二个字符串的所有后缀,每个后缀对于这个sum的贡献是这个后缀在第一个字符串出现的次数*后缀的长度,最后输出的答案应当是 sum % 1e9+7 分析 : 有两种做法,如果会拓展KMP的话可以说这就是一道模板题了,拓展KMP专门就是找最长公共前缀的长度,首先将给出的两个字符串双双反转,用模式串去跟主串跑一遍拓展KMP,得到 extend 数组,然后只要遍历一遍 extend 数组,每一个 extend[i] 表示模式串里面前 extend[i…

2015浙江财经大学ACM有奖周赛(一) 题解报告 命题:丽丽&&黑鸡 这是命题者原话. 题目涉及的知识面比较广泛,有深度优先搜索.广度优先搜索.数学题.几何题.贪心算法.枚举.二进制等等... 有些题目还需要大家对程序的效率做出优化..大一的小宝宝可能有一些吃不消..当成是一种体验就好了. 题解目录: ZUFE OJ 2307: 最长连续不下降子串 ZUFE OJ 2308: Lucky Number ZUFE OJ 2309: 小明爱吃面 ZUFE OJ 2310: 小明爱消除 ZUF…