裸的强连通 ; type node=record f,t:longint; end; var n,m,dgr,i,u,v,num,ans:longint; bfsdgr,low,head,f:array[..maxe] of longint; b:array[..maxe] of node; p:array[..maxe] of boolean; procedure insert(u,v:longint); begin with b[i] do begin f:=head[u]; t:=v; e…

1654: [Usaco2006 Jan]The Cow Prom 奶牛舞会 Time Limit: 5 Sec  Memory Limit: 64 MB Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new shoes. They know that ton…

Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new shoes. They know that tonight they will each try to perform the Round Dance. Only cows can perform the…

Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new shoes. They know that tonight they will each try to perform the Round Dance. Only cows can perform the…

Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new shoes. They know that tonight they will each try to perform the Round Dance. Only cows can perform the…

http://www.lydsy.com/JudgeOnline/problem.php?id=1654 请不要被这句话误导..“ 如果两只成功跳圆舞的奶牛有绳索相连,那她们可以同属一个组合．” 这句话没啥用.. #include <cstdio> #include <cstring> #include <cmath> #include <string> #include <iostream> #include <algorithm>…

Description 约翰的N(2≤N≤10000)只奶牛非常兴奋,因为这是舞会之夜!她们穿上礼服和新鞋子,别上鲜花,她们要表演圆舞．     只有奶牛才能表演这种圆舞．圆舞需要一些绳索和一个圆形的水池．奶牛们围在池边站好,顺时针顺序由1到N编号．每只奶牛都面对水池,这样她就能看到其他的每一只奶牛．为了跳这种圆舞,她们找了M(2≤M≤50000)条绳索．若干只奶牛的蹄上握着绳索的一端,绳索沿顺时针方绕过水池,另一端则捆在另一些奶牛身上．这样,一些奶牛就可以牵引另一些奶牛．有的奶牛可能握有很多绳…

几乎是板子,求有几个size>1的scc 直接tarjan即可 #include<iostream> #include<cstdio> #include<cstring> using namespace std; const int N=10005; int n,m,h[N],cnt,ans,tmp,dfn[N],low[N],s[N],top; bool v[N]; struct qwe { int ne,to; }e[N*10]; int read() { i…

[BZOJ1720][Usaco2006 Jan]Corral the Cows 奶牛围栏 Description Farmer John wishes to build a corral for his cows. Being finicky beasts, they demand that the corral be square and that the corral contain at least C (1 <= C <= 500) clover fields for afterno…

http://www.lydsy.com/JudgeOnline/problem.php?id=1720 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 177  Solved: 90[Submit][Status][Discuss] Description Farmer John wishes to build a corral for his cows. Being finicky beasts, they demand that the corr…

金组题什么的都要绕个弯才能AC..不想银组套模板= = 题目大意:给n个点,求最小边长使得此正方形内的点数不少于c个 首先一看题就知道要二分边长len 本来打算用二维前缀和来判断,显然时间会爆,而且坐标最大10000是不可行的 为保证效率,检验的时间应该在O(n2) 所以我们先给x排个序,以每个点的x坐标为左边界,x+len-1为右边界 然后以y为关键字从小到大序后枚举点,用双指针法O(n)更新len以内能保存多少个点 点数大于等于c就可行 #include<stdio.h> #include…

我对二分的理解:https://www.cnblogs.com/AKMer/p/9737477.html 题目传送门:https://www.lydsy.com/JudgeOnline/problem.php?id=1720 坐标值域很大,但是真正涉及的只有\(500\)个,我们可以离散化做.二分长度,直接二维前缀和检查就行了 h时间复杂度:\(O(log10000*n^2*logn)\) 空间复杂度:\(O(n)\) 代码如下: #include <cstdio> #include <…

洛谷——P2863 [USACO06JAN]牛的舞会The Cow Prom 题目描述 The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new shoes. They know that tonight they will each try to perform the Round D…

P2863 [USACO06JAN]牛的舞会The Cow Prom 123通过 221提交 题目提供者 洛谷OnlineJudge 标签 USACO 2006 云端 难度 普及+/提高 时空限制 1s / 128MB 题目描述 The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete with corsages and new…

1648: [Usaco2006 Dec]Cow Picnic 奶牛野餐 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 554  Solved: 346[Submit][Status][Discuss] Description The cows are having a picnic! Each of Farmer John's K (1 <= K <= 100) cows is grazing in one of N (1 <= N <…

1666: [Usaco2006 Oct]Another Cow Number Game 奶牛的数字游戏 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 502  Solved: 432[Submit][Status] Description 奶牛们又在玩一种无聊的数字游戏.输得很郁闷的贝茜想请你写个程序来帮她在开局时预测结果.在游戏的开始,每头牛都会得到一个数N(1<=N<=1,000,000).此时奶牛们的分数均为0.如果N是奇数,那么奶牛就会把…

1612: [Usaco2008 Jan]Cow Contest奶牛的比赛 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 645  Solved: 433[Submit][Status] Description FJ的N(1 <= N <= 100)头奶牛们最近参加了场程序设计竞赛:).在赛场上,奶牛们按1..N依次编号.每头奶牛的编程能力不尽相同,并且没有哪两头奶牛的水平不相上下,也就是说,奶牛们的编程能力有明确的排名. 整个比赛被分成了若干轮,…

1612: [Usaco2008 Jan]Cow Contest奶牛的比赛 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 891  Solved: 590[Submit][Status][Discuss] Description FJ的N(1 <= N <= 100)头奶牛们最近参加了场程序设计竞赛:).在赛场上,奶牛们按1..N依次编号.每头奶牛的编程能力不尽相同,并且没有哪两头奶牛的水平不相上下,也就是说,奶牛们的编程能力有明确的排名. 整个比…

对于第 i 头牛 , 假如排名比它高和低的数位 n - 1 , 那么他的 rank 便可以确定 . floyd --------------------------------------------------------------------------------------- #include<cstdio> #include<cstring> #include<algorithm> #include<iostream>   #define rep…

直接从每个奶牛所在的farm dfs , 然后算一下.. ---------------------------------------------------------------------------------------- #include<cstdio> #include<algorithm> #include<cstring> #include<iostream> #include<vector>   #define rep( i…

1648: [Usaco2006 Dec]Cow Picnic 奶牛野餐 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 432  Solved: 270[Submit][Status] Description The cows are having a picnic! Each of Farmer John's K (1 <= K <= 100) cows is grazing in one of N (1 <= N <= 1,000)…

P2863 [USACO06JAN]牛的舞会The Cow Prom 求点数$>1$的强连通分量数,裸的Tanjan模板. #include<iostream> #include<cstdio> #include<cstring> using namespace std; int min(int &a,int &b){return a<b?a:b;} #define N 10002 #define M 50002 int n,m,clo,df…

Cow Contest奶牛的比赛 bzoj-1612 Usaco-2008 Jan 题目大意:题目链接. 注释:略. 想法: 我们对于每个点dfs,看一下比这个点大的点加上比这个点小的点是否是n-1即可. 最后,附上丑陋的代码... ... #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; const int N…

tarjan求边双连通分量, 然后就是一棵树了, 可以各种乱搞... ------------------------------------------------------------------------------- #include<cstdio> #include<cstring> #include<algorithm>   using namespace std;   const int maxn = 5009;   struct edge { int…

1718: [Usaco2006 Jan] Redundant Paths 分离的路径 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 1132  Solved: 590[Submit][Status][Discuss] Description     为了从F(1≤F≤5000)个草场中的一个走到另一个,贝茜和她的同伴们有时不得不路过一些她们讨厌的可怕的树．奶牛们已经厌倦了被迫走某一条路,所以她们想建一些新路,使每一对草场之间都会至少有两条相互分离的…

[BZOJ1604][Usaco2008 Open]Cow Neighborhoods 奶牛的邻居 试题描述 了解奶牛们的人都知道,奶牛喜欢成群结队．观察约翰的N(1≤N≤100000)只奶牛,你会发现她们已经结成了几个"群"．每只奶牛在吃草的时候有一个独一无二的位置坐标Xi,Yi(l≤Xi,Yi≤[1．.10^9]:Xi,Yi∈整数．当满足下列两个条件之一,两只奶牛i和j是属于同一个群的:   1．两只奶牛的曼哈顿距离不超过C(1≤C≤10^9),即lXi - xil+IYi - Y…

http://poj.org/problem?id=3180 The Cow Prom Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 1428   Accepted: 903 Description The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest gowns, complete…

1638: [Usaco2007 Mar]Cow Traffic 奶牛交通 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 571  Solved: 199[Submit][Status] Description 农 场中,由于奶牛数量的迅速增长,通往奶牛宿舍的道路也出现了严重的交通拥堵问题.FJ打算找出最忙碌的道路来重点整治. 这个牧区包括一个由M (1 ≤ M ≤ 50,000)条单行道路(有向)组成的网络,以及 N (1 ≤ N ≤ 5,000)…

1635: [Usaco2007 Jan]Tallest Cow 最高的牛 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 346  Solved: 184[Submit][Status] Description FJ's N (1 <= N <= 10,000) cows conveniently indexed 1..N are standing in a line. Each cow has a positive integer height…

题目 1635: [Usaco2007 Jan]Tallest Cow 最高的牛 Time Limit: 5 Sec  Memory Limit: 64 MB Description FJ's N (1 <= N <= 10,000) cows conveniently indexed 1..N are standing in a line. Each cow has a positive integer height (which is a bit of secret). You are t…