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URAL 1076 Trash Trash(最大权匹配)
Trash Time limit: 1.0 secondMemory limit: 64 MB You were just hired as CEO of the local junkyard.One of your jobs is dealing with the incoming trash a ...
分类:其他好文   时间:2016-11-07 22:16:16    阅读次数:259
URAL 1024 Permutations(LCM)
题意:已知,可得出 P(1) = 4, P(2) = 1, P(3) = 5,由此可得出 P(P(1)) = P(4) = 2. And P(P(3)) = P(5) = 3,因此。经过k次如上变换,最终可得,输入保证一定有解,求k。 分析: 1、能用数组表示映射就别用map,很耗时 2、序列中的每 ...
分类:其他好文   时间:2016-11-05 15:01:05    阅读次数:275
URAL Mosaic(并查集)(欧拉回路)
Mosaic Time limit: 0.25 secondMemory limit: 64 MB There's no doubt that one of the most important and crucial things to do in this world is to bring u ...
分类:其他好文   时间:2016-11-04 19:58:15    阅读次数:223
指数分布族与广义线性模型
整理一下之前所学过的关于回归问题的思路: 问题引入:房屋估价,给定新的房屋信息,预测出相应的房屋价格; 学习过程:构建模型h(θ); 线性回归:最小二乘法、梯度下降法、线性模型的概率解释; 局部加权回归:带权重的线性回归、权值的钟形函数; 逻辑回归:分类方法、梯度上升法、牛顿法、引出感知机学习算法; ...
分类:其他好文   时间:2016-11-03 01:53:41    阅读次数:463
URAL 1004 Sightseeing Trip(最小环)
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 cl ...
分类:其他好文   时间:2016-11-02 00:27:47    阅读次数:229
URAL 1056 Computer Net(最短路)
Computer Net Time limit: 2.0 secondMemory limit: 64 MB Background Computer net is created by consecutive computer plug-up to one that has already been ...
分类:Web程序   时间:2016-10-29 11:49:06    阅读次数:208
URAL 1072 Routing(最短路)
Routing Time limit: 1.0 secondMemory limit: 64 MB There is a TCP/IP net of several computers. It means that: Each computer has one or more net interfa ...
分类:其他好文   时间:2016-10-29 01:38:57    阅读次数:243
URAL 1291 Gear-wheels(BFS)
Gear-wheels Time limit: 1.0 secondMemory limit: 64 MB — Arny! What happened with coordinator? Bad working coordinator was the everlasting trouble of t ...
分类:其他好文   时间:2016-10-28 23:24:24    阅读次数:269
URAL 1077 Travelling Tours(统计无向图中环的数目)
Travelling Tours Time limit: 1.0 secondMemory limit: 64 MB There are N cities numbered from 1 to N (1 ≤ N ≤ 200) and M two-way roads connect them. The ...
分类:其他好文   时间:2016-10-25 19:20:42    阅读次数:247
[codevs1380]没有上司的舞会([BZOJ2060][Usaco2010 Nov]Visiting Cows 拜访奶牛)
[codevs1380]没有上司的舞会 试题描述 Ural大学有N个职员,编号为1~N。他们有从属关系,也就是说他们的关系就像一棵以校长为根的树,父结点就是子结点的直接上司。每个职员有一个快乐指数。现在有个周年庆宴会,要求与会职员的快乐指数最大。但是,没有职员愿和直接上司一起与会。 Ural大学有N ...
分类:其他好文   时间:2016-10-22 21:26:28    阅读次数:202
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