SP7022 CPATTERN - Cow Patterns】的更多相关文章

本篇题解用于作者本人加深理解,也欢迎大家阅读. 这道题的正解是\(KMP\)加上树状数组,记录每一个位置前几个位置比其小的.相等的.大的数的数量,比较方式便是比较相应的数量,若相等,则匹配成功. 但是本篇题解使用了\(Hash\)的做法,因为\(1<=s<=25\),所以我们可以利用一个数组,并利用二进制的压缩方式,记录每一个数存在的位置.即: \(hash[i]\)表示数字\(i\)在\(k\)的长度中出现的位置的二进制压缩. 如\(hash[i]=1000101_2\)就表示\(i\)在长…
Cow Patterns Description A particular subgroup of K (1 <= K <= 25,000) of Farmer John's cows likes to make trouble. When placed in a line, these troublemakers stand together in a particular order. In order to locate these troublemakers, FJ has lined…
题意:给2个数字序列 a 和 b ,问按从小到达排序后,a中的哪些子串与b的名次匹配. a 的长度 N≤100,000,b的长度 M≤25,000,数字的大小 K≤25. 解法:[思考]1.X 暴力.枚举 a 中的子串,选出来排序后比对名次.O(n*  m log m  *m)=O(n*m^2*log m).    2.X  暴力+树状数组优化.枚举 a 中的子串,选出来后比较前缀名次(P.S.这种转化常出现,比如:[洛谷 p3368]模板-树状数组 2(数据结构) 就是将个体转化为前缀.),看…
Description 约翰的N(1≤N≤100000)只奶牛中出现了K(1≤K≤25000)只爱惹麻烦的坏蛋.奶牛们按一定的顺序排队的时候,这些坏蛋总会站在一起.为了找出这些坏蛋,约翰让他的奶牛排好队进入牛棚,同时需要你的慧眼来识别坏蛋,为了区分,约翰给所有奶牛都发了号牌,上面写着一个1..S(1≤S≤25)之间的数字.虽然这不是一个完美的方法,但也能起一点作用.现在,约翰已经不记得坏蛋们的具体号码.但是凭他的记忆,他给出一个"模式串".原坏蛋的号码如果相同,模式串中他们的号码依然相…
题目链接:http://poj.org/problem?id=3167 题意:模式串可以浮动的模式匹配问题给出模式串的相对大小,需要找出模式串匹配次数和位置. 思路:统计比当前数小,和于当前数相等的,然后进行kmp. 比如说模式串:1,4,4,2,3,1 而主串:5,6,2,10,10,7,3,2,9,那么2,10,10,7,3,2就是匹配的 code: #include <cstdio> #include <cstring> #include <vector> usi…
Description     约翰的N(1≤N≤100000)只奶牛中出现了K(1≤K≤25000)只爱惹麻烦的坏蛋.奶牛们按一定的顺序排队的时候,这些坏蛋总会站在一起.为了找出这些坏蛋,约翰让他的奶牛排好队进入牛棚,同时需要你的慧眼来识别坏蛋,为了区分,约翰给所有奶牛都发了号牌,上面写着一个1..S(1≤S≤25)之间的数字.虽然这不是一个完美的方法,但也能起一点作用.现在,约翰已经不记得坏蛋们的具体号码.但是凭他的记忆,他给出一个“模式串”.原坏蛋的号码如果相同,模式串中他们的号码依然相同…
题意:给你两串数字,长度分别为n和m,数字大小在[1,25].当后一串数字每个数字的排名位置与前一串数字(任一长度为m的子串)每个数字的排名位置一致时就完全匹配,最后求哪些位置是完全匹配的. 例如:1 4 2 5 3 6 与 1 3 2 4  答案就是:1 3(第一串数字的第一个位置开始与第三个位置开始) 挺难想的一个题,我们需要使用dp的思想加前缀和进行KMP匹配 首先,两串数字串完全匹配就可以想到KMP,这样我们就只需要解决一个问题:两个数字怎样才算是“相等”(这儿并不是值一样就“相等”).…
杭电ACM分类: 1001 整数求和 水题1002 C语言实验题——两个数比较 水题1003 1.2.3.4.5... 简单题1004 渊子赛马 排序+贪心的方法归并1005 Hero In Maze 广度搜索1006 Redraiment猜想 数论:容斥定理1007 童年生活二三事 递推题1008 University 简单hash1009 目标柏林 简单模拟题1010 Rails 模拟题(堆栈)1011 Box of Bricks 简单题1012 IMMEDIATE DECODABILITY…
bzoj 2197: [Usaco2011 Mar]Tree Decoration 树形dp..f[i]表示处理完以i为根的子树的最小时间. 因为一个点上可以挂无数个,所以在点i上挂东西的单位花费就是i所在子树里的最小单位花费.. 所以每次求f[i]只要使子树里的数量都满足要求就好了..i的祖先还要更多的话随时可以选某个节点多挂一些.. f[i]=sum{f[j]}+mincost[i]*max(need[i]-sum{need[j]},0)..(j是i的儿子,mincost[i]表示子树i里的…
转载:from http://blog.csdn.net/qq_28236309/article/details/47818349 基础题:1000.1001.1004.1005.1008.1012.1013.1014.1017.1019.1021.1028.1029. 1032.1037.1040.1048.1056.1058.1061.1070.1076.1089.1090.1091.1092.1093. 1094.1095.1096.1097.1098.1106.1108.1157.116…
听说KPM初二暑假就补完了啊%%% 先刷Gold再刷Silver(因为目测没那么多时间刷Silver,方便以后TJ2333(雾 按AC数降序刷 ------------------------------------------------------------------------------------------------------- bzoj1597: [Usaco2008 Mar]土地购买  斜率优化DP h升序,w降序. f[i]=min(f[j]+h[i]*w[j+1])…
一.知识目录 字符串处理 ................................................................. 3 1.KMP 算法 ............................................................ 3 2.扩展 KMP ............................................................ 6 3.Manacher 最长回文子串 .......…
Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…
POJ 3461: Oulipo 题意: 求出第一个串在第二个串中的出现次数... 分析: KMP板子题... 代码: #include<algorithm> #include<iostream> #include<cstring> #include<cstdio> //by NeighThorn using namespace std; //眉眼如初,岁月如故 +; int cas,lens,lenp,nxt[maxn]; char s[maxn],p[m…
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…
POJ  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 can't predict the quality of milk from one day to the next, there are some regul…
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,…
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,…
                                                                    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 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,…
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 some regular patterns in th…
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…
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,…
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,…
题目地址:http://poj.org/problem?id=3261 题目: 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…
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 some regular patterns in th…
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…