DescriptionThe citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral poster...
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其他好文 时间:
2015-08-01 15:34:25
阅读次数:
101
Problem DescriptionHere are n Candidates in one election. Every Candidate could vote any one (of course himself/herself). In this election, the one wh...
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其他好文 时间:
2015-05-28 19:37:25
阅读次数:
117
SOJ1942 ,Foto,数论,排列组合,快速排列组合
The election campaign just started, so PSOS decided to make some propagation. One of the representatives came with a great idea - he proposes to make an photography of their Parliament Club. Unfortunatelly, even after many brie...
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其他好文 时间:
2015-05-08 09:42:58
阅读次数:
170
这篇从原理上理解2-sat如何转化成图论问题简述了如何了实现算法:http://wenku.baidu.com/view/31fd7200bed5b9f3f90f1ce2.html
总的来说2-sat有两种算法,一种用dfs染色搜索出一种解,一种用tarjan(判定是否有解)+拓扑排序构造出任意一个可行解。
dfs从理论上复杂度很高,但是实际上远远达不到上界,而且可以按字典序搜索,实现也简单多...
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其他好文 时间:
2015-04-24 09:09:08
阅读次数:
233
Election Time
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 7845
Accepted: 4176
Description
The cows are having their first election after overthrowing t...
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其他好文 时间:
2015-04-10 22:32:12
阅读次数:
145
1675: [Usaco2005 Feb]Rigging the Bovine Election 竞选划区Time Limit:5 SecMemory Limit:64 MBSubmit:198Solved:118[Submit][Status][Discuss]DescriptionIt's el...
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其他好文 时间:
2015-04-10 13:31:50
阅读次数:
291
1675: [Usaco2005 Feb]Rigging the Bovine Election 竞选划区Time Limit:5 SecMemory Limit:64 MBSubmit:196Solved:116[Submit][Status][Discuss]DescriptionIt's el...
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其他好文 时间:
2015-04-10 01:21:19
阅读次数:
240
Apache Curator Leader Election...
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Web程序 时间:
2015-02-27 17:09:21
阅读次数:
217
题目大意:
有N个候选人,有M组要求,每组要求关系到候选中的两个人A和B,"+A +B"表示A和B中至少
有一人被选中,"-A -B"表示A和B中至少有一人不被选中。"+A -B"表示A被选中和B不被选中两
件事至少发生一件。"-A +B"表示A不被选中和B被选中至少发生一件。那么问题来了:是否存在
M组要求全部符合的方案。
思路:在本题中,每个人都有两种状态,一种是选中,一种是不选中。可以把一个人i拆成两个点
Pi和P(i+N),分别表示当选和落选。那么两个人i和j的关系就可以表示为以下四种:
i和j至...
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其他好文 时间:
2015-02-20 22:00:24
阅读次数:
204