P1821 [USACO07FEB]银牛派对Silver Cow Party 题目描述 One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to attend the big cow party to be held at farm #X (1 ≤ X ≤ N). A total of M (1 ≤ M ≤ 100,000) unidirectional (one-way roads co…

[BZOJ1606][Usaco2008 Dec]Hay For Sale 裸01背包 ;i<=n;i++) for(int j=m;j>=a[i];j--) f[j]=max(f[j],f[j-a[i]]+a[i]); [BZOJ1607][Usaco2008 Dec]轻拍牛头 暴力 [BZOJ1609][Usaco2008 Feb]麻烦的聚餐 要求最长上升子序列或最长下降子序列的长度. 最基础的有dp算法 ;i<=n;i++) ;j<=;j++){ ;k<=j;k++)f…

题意:有n个地点,有m条路,问从所有点走到指定点x再走回去的最短路中的最长路径 思路:用Floyd超时的,这里用的Dijkstra. Dijkstra感觉和Prim和Kruskal的思路很像啊.我们把所有点分为两个集合:S(和源点在同一集合),T(其余点),用dis数组表示每个点到S的最短距离,vis数组记录这个点是否在S中.我们每次找出在T的一个和S距离最短的点,加到S中,这个距离就是他到源点的最短路径(听说能证,我不会证...),然后更新其他点,直到所有点都在S. 这道题从x走回去很简单,就…

题目链接:https://www.luogu.org/problemnew/show/P1821 反向多存一个图,暴力跑两遍 #include <cstdio> #include <iostream> #include <algorithm> #include <queue> #include <cstring> using namespace std; ; const int inf = 0x7fffffff; int n, m, x, dis…

最近因为闲的蛋疼(停课了),所以开始做一些 USACO 的银组题.被完虐啊 TAT 貌似 Pogo-Cow 这题是 2013 Nov Silver 唯一一道可说的题目? Pogo-Cow Description (大意是一条直线上有一些带权值的点,可以选择一个点作为出发点,选好一个前进方向(左或右)然后不断地向前跳到另一个点,得分为这个点的权值,要求每一跳的跳跃距离不小于前一跳,求能获得的最大得分) In an ill-conceived attempt to enhance the mobil…

Silver Cow Party 题目链接: http://acm.hust.edu.cn/vjudge/contest/122685#problem/D Description One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to attend the big cow party to be held at farm #X (1 ≤ X ≤ N). A total of M (1 ≤…

Silver Cow Party Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 17017   Accepted: 7767 Description One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to attend the big cow party to be held at farm #X (1 ≤ X …

1675: [Usaco2005 Feb]Rigging the Bovine Election 竞选划区 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 198  Solved: 118[Submit][Status][Discuss] Description It's election time. The farm is partitioned into a 5x5 grid of cow locations, each of which hold…

1675: [Usaco2005 Feb]Rigging the Bovine Election 竞选划区 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 196  Solved: 116[Submit][Status][Discuss] Description It's election time. The farm is partitioned into a 5x5 grid of cow locations, each of which hold…

Silver Cow Party Time Limit : 4000/2000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other) Total Submission(s) : 1   Accepted Submission(s) : 1 Problem Description One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is goin…