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[题解]USACO 1.3 Wormholes
Farmer John's hobby of conducting high-energy physics experiments on weekends has backfired, causing N wormholes (2 <= N <= 12, N even) to materialize ...
分类:其他好文   时间:2016-12-25 17:40:26    阅读次数:252
挑战程序设计竞赛 2.5 它们其实都是“图”
【Summarize】 1.注意对图是否连通的判定 2.灵活运用边权取负的技巧 AOJ 0189:Convenient Location POJ 2139:Six Degrees of Cowvin Bacon POJ 3268:Silver Cow Party POJ 3259:Wormholes ...
分类:其他好文   时间:2016-11-23 07:51:17    阅读次数:294
POJ 3259 Wormholes (判负环)
Wormholes Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 46123 Accepted: 17033 Description While exploring his many farms, Farmer John has ...
分类:其他好文   时间:2016-11-12 19:59:09    阅读次数:188
poj Wormholes 【最短路径】【bellman_ford】
Wormholes Description While exploring his many farms, Farmer John has discovered a number of amazing wormholes. A wormhole is very peculiar because it ...
分类:其他好文   时间:2016-10-12 00:37:35    阅读次数:218
【USACO 1.3】Wormholes
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分类:其他好文   时间:2016-09-27 17:59:13    阅读次数:139
bzoj1715[Usaco2006 Dec]Wormholes 虫洞*
bzoj1715[Usaco2006 Dec]Wormholes 虫洞 题意: 判一个图是否有负环。点数≤500,边数≤3000。(我看不懂原题,后来看了题解,就直接这样说了) 题解: SPFA中如果一个点被更新了n次以上,那么这个图中存在负环。 代码: 20160912 ...
分类:其他好文   时间:2016-09-16 16:54:25    阅读次数:135
Bellman-Ford算法
Bellman-Ford可以求有负权的图的最短路,也可以判断是否有负环存在。 单源最短路模板 如果没有环,最多更新n-1次,n是点的个数,如果更新了n次,证明图中有环。因为求的是最短路,所以一般判断的是负环,正环也可以判断的。 poj3259 Wormholes 求是否存在负环 #include < ...
分类:编程语言   时间:2016-09-01 21:31:27    阅读次数:220
USACO 1.3 Wormholes
Farmer John's hobby of conducting high-energy physics experiments on weekends has backfired, causing N wormholes (2 <= N <= 12, N even) to materialize ...
分类:其他好文   时间:2016-08-28 18:14:41    阅读次数:234
poj3259——Wormholes(Eellman-Ford算法)
DescriptionWhile exploring his many farms, Farmer John has discovered a number of amazing wormholes. A wormhole is very peculiar because it is a one-way path that delivers you to its destination at a t...
分类:编程语言   时间:2016-08-12 18:29:06    阅读次数:222
ACM: POJ 3259 Wormholes - SPFA负环判定
POJ 3259 Wormholes Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%lld & %llu POJ 3259 Wormholes Description While exploring his many farms, F ...
分类:其他好文   时间:2016-08-12 00:39:53    阅读次数:577
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