Sightseeing Trip Time limit: 0.5 secondMemory limit: 64 MB There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attractions, sightseeing the town. To earn as much as possible from this a…

Sightseeing Trip Time Limit: 2000ms Memory Limit: 16384KB This problem will be judged on Ural. Original ID: 100464-bit integer IO format: %lld      Java class name: (Any)   There is a travel agency in Adelton town on Zanzibar island. It has decided t…

https://vjudge.net/problem/URAL-1004 题意:求路径最小的环(至少三个点),并且输出路径. 思路: 一开始INF开大了...无限wa,原来相加时会爆int... 路径输出的算法是这样的: 接下来就要看一看如何找出最短路径所行经的城市了,这里要用到另一个矩阵P,它的定义是这样的:p(ij)的值如果为p,就表示i到j的最短行经为i->...->p->j,也就是说p是i到j的最短行径中的j之前的最后一个城市.P矩阵的初值为p(ij)=i.有了这个矩阵之后,要找…

一个最小环裸题.最小环的两种求法dijkstra和Floyd直接参见这里我就是从这里学的,不想写了. 注意这里最重要的一个点是利用了Floyd的dp过程中路径上点不超过$k$这一性质,来枚举环上最大编号并枚举连边,这样另外枚举的两个点的最短路肯定不会经过和$k$连的边. 坑点: 平常inf都开0x3f3f3f3f,这题没注意,在求环那里如果三个inf一加,就爆掉了..所以要改小一点.这个问题值得重视. Floyd正常输出路径应该就更新的时候记录中间点,最后直接递归输出.但是这里因为记录路径中$x…

Sightseeing trip Time Limit: 1000MS   Memory Limit: 65536K Total Submissions:8588   Accepted:3224   Special Judge Description There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attract…

题目描述 原题来自:CEOI 1999 给定一张无向图,求图中一个至少包含 333 个点的环,环上的节点不重复,并且环上的边的长度之和最小.该问题称为无向图的最小环问题.在本题中,你需要输出最小环的方案,若最小环不唯一,输出任意一个均可.若无解,输出 No solution..图的节点数不超过 100100100. 输入格式 第一行两个正整数 n,mn,mn,m 表示点数和边数.接下来 mmm 行,每行三个正整数 x,y,zx,y,zx,y,z,表示节点 x,yx,yx,y 之间有一条长度为 z…

Sightseeing trip Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 5590   Accepted: 2151   Special Judge Description There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attra…

Sightseeing trip Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8520   Accepted: 3200   Special Judge Description There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attra…

Sightseeing trip Time Limit: 1000MS Memory Limit: 65536K Total Submissions: Accepted: Special Judge Description There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attractions, sightsee…

[CEOI1999]Sightseeing trip Description There is a travel agency in Adelton town on Zanzibar island. It has decided to offer its clients, besides many other attractions, sightseeing the town. To earn as much as possible from this attraction, the agenc…