题目链接:https://vjudge.net/problem/POJ-3261 Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 17157   Accepted: 7592 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies f…

                                                                    Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 13072   Accepted: 5812 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk…

                                                    Milk Patterns 题意:求可重叠的至少重复出现k次的最长的字串长. 这题的做法和上一题差不多,也是先二分答案,然后将后缀分成若干组.不同的是,这里要判断的是有没有一个组的后缀个数不小于k.如果有,那么存在k个相同的子串满足条件,否则不存在.这个做法的时间复杂度为 O(nlogn). #include <map> #include <set> #include <q…

Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to the next, there are some regular patterns in the dai…

题目大意:找出至少出现K次的子串的最长长度. 题目分析:二分枚举长度x,判断有没有最长公共前缀不小于x的并且连续出现了至少k次的有序子串区间. 代码如下: # include<iostream> # include<cstdio> # include<map> # include<vector> # include<cstring> # include<algorithm> using namespace std; # define…

[题目链接] http://poj.org/problem?id=3261 [题意] 至少出现k次的可重叠最长子串. [思路] 二分长度+划分height,然后判断是否存在一组的数目不小于k即可. 需要注意的是:用末尾添0的方法解决n==1时的RE问题,但是在can中需要忽略height[0]且考虑height[1..n]. [代码] #include<cstdio> #include<cstring> #include<iostream> #define FOR(a,…

题目链接:http://poj.org/problem?id=3261 思路: 后缀数组的很好的一道入门题目 先利用模板求出sa数组和height数组 然后二分答案(即对于可能出现的重复长度进行二分) ,二分的时候,对 height进行分组,看是否存在一组height值使得其重复的次数大于等于k 代码如下: #include<iostream> #include<cstdlib> #include<cstdio> #include<cstring> usin…

牛奶模式 时间限制: 5000MS   内存限制: 65536K 提交总数: 16796   接受: 7422 案件时间限制: 2000MS 描述 农夫约翰已经注意到,他的牛奶的质量每天都在变化.经进一步调查,他发现虽然不能预测一天到下一天的牛奶质量,但每天的牛奶质量有一些规律. 要执行严格的研究,他已经发明了其中每个奶样本被记录为0到1,000,000之间的整数一个复杂的分类方案,并且已经从单一的母牛超过记录数据Ñ(1≤ Ñ ≤20000)天.他希望找到其等同至少K(2≤重复样品的最长图案ķ …

题目求最长的重复k次可重叠子串. 与POJ1743同理. 二分枚举ans判定是否成立 height分组,如果大于等于ans的组里的个数大于等于k-1,这个ans就可行 #include<cstdio> #include<cstring> #include<algorithm> using namespace std; #define MAXN 1000001 int wa[MAXN],wb[MAXN],wv[MAXN],ws[MAXN]; int cmp(int *r,…

Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 9274   Accepted: 4173 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation,…

Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 16742   Accepted: 7390 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation,…

1717: [Usaco2006 Dec]Milk Patterns 产奶的模式 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 1017  Solved: 561[Submit][Status][Discuss] Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的…

Milk Patterns   Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to the next, there are some…

1717: [Usaco2006 Dec]Milk Patterns 产奶的模式 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 881  Solved: 480[Submit][Status][Discuss] Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的数…

Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 7586   Accepted: 3448 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation,…

后缀数组 o(︶︿︶)o 唉傻逼了一下,忘了把后缀数组的字典范围改回20001,直接21交了上去,白白RE了两发……sigh 既然要找出现了K次的子串嘛,那当然要用后缀数组了>_>(因为我太弱不会自动机&树) ok离散化后上后缀数组,求出height数组>_>然后用个……ST表= =?! O(n)地扫一遍所有的区间……看所有长度为k的里面最大的min(i,i+k-1)是多少(当然,k要减一,因为是K个子串的话对应的是K-1个串的LCP) 水题还RE了两发→_→真是难过 /*…

后缀数组+二分答案+离散化.(上次写的时候看数据小没离散化然后一直WA...写了lsj师兄的写法. #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> using namespace std; #define REP(i,s,t) for(int i=s;i<=t;i++) #define dwn(i,s,t) for(int i=s;i>=t;i--…

Milk PatternsTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://poj.org/problem?id=3261 Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he c…

Milk Patterns Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 7938   Accepted: 3598 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation,…

[Usaco2006 Dec]Milk Patterns Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天 产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的数.并且John记录了N(1<=N<=20000)天的 牛奶质量值.他想知道最长的出现了至少K(2<=K<=N)次的模式的长度. 比如1 2 3 2 3 2 3 1 中 2 3 2 3出…

二分答案m, 后缀数组求出height数组后分组来判断. ------------------------------------------------------------ #include<bits/stdc++.h>   using namespace std;   const int maxn = 20009;   struct HASH { int id[maxn], N; HASH() { N = 0; } inline void work() { sort(id, id +…

1717: [Usaco2006 Dec]Milk Patterns 产奶的模式 Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个"模式". John的牛奶按质量可以被赋予一个0到1000000之间的数.并且John记录了N(1<=N<=20000)天的牛奶质量值.他想知道最长的出现了至少K(2<=K<=N)次的模式的长度.比如1 2 3 2…

BZOJ_1717_[Usaco2006 Dec]Milk Patterns 产奶的模式_后缀数组 Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的数.并且John记录了N(1<=N<=20000)天的牛奶质量值.他想知道最长的出现了至少K(2<=K<=N)次的模式的长度.比如1 2 3 2…

[BZOJ1717][Usaco2006 Dec]Milk Patterns Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的数.并且John记录了N(1<=N<=20000)天的牛奶质量值.他想知道最长的出现了至少K(2<=K<=N)次的模式的长度.比如1 2 3 2 3 2 3 1 中 2…

题目题目:http://poj.org/problem?id=3261 Milk Patterns Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 18880 Accepted: 8336 Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day t…

[USACO06FEC]Milk Patterns 题目描述: Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to the next, there are…

洛谷题目链接:[USACO06DEC]牛奶模式Milk Patterns 题目描述 Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to the next,…

1717: [Usaco2006 Dec]Milk Patterns 产奶的模式 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 1469  Solved: 799[Submit][Status][Discuss] Description 农夫John发现他的奶牛产奶的质量一直在变动.经过细致的调查,他发现:虽然他不能预见明天产奶的质量,但连续的若干天的质量有很多重叠.我们称之为一个“模式”. John的牛奶按质量可以被赋予一个0到1000000之间的…

Milk Patterns 产奶的模式 bzoj-1717 Usaco-2006 Dec 题目大意:给定一个字符串,求最长的至少出现了$k$次的子串长度. 注释:$1\le n\le 2\cdot 10^4$,$2\le k\le n$. 想法:不难想到二分答案,现在我们考虑如何验证. 这里就是后缀数组的一个妙用了. 我们对原串建立后缀数组,观察$ht$数组. 考虑当前二分出来的$mid$.如果有至少连续$k$的$ht$值都不小于$mid$,那么$k$就是合法的. 故此我们直接扫$ht$数组看看…

Milk Patterns Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to th…