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昨天校赛的XDUgirls(hdu3127)求教~~
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MAT WETU
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Jun 20, 2011, 5:09:30 AM
6/20/11
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http://acm.xidian.edu.cn/land/problem/detail?problem_id=1118
http://acm.hdu.edu.cn/showproblem.php?pid=3127
带图的“题解”:
http://archive.cnblogs.com/a/1856555/
把官方标程下下来看过了,网上的题解也看过了,还是不明白为什么那样转移状态能保证最优解(都木有证明,连详细点的原因都没)。。。
顺便,我还觉得标程错了(是不是有点无理取闹),对于下面这组数据:
1
8 100 100
54 51 1000
58 47 886
49 46 614
45 42 429
46 3 25
42 3 17
58 1 5
54 1 2
标程算出是2961
而按照附件图中的切法(有木有理解错了题意?),可以得到一个2978的更优解~
各位大牛,怎么办啊?
MAT WETU
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Jun 20, 2011, 5:11:04 AM
6/20/11
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忘发图了-.-
output.pdf
艾庆兴
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Jun 26, 2011, 11:16:35 AM
6/26/11
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额,题意是说,每个女孩可以要无数块布的呢
MAT WETU
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Jun 26, 2011, 12:33:37 PM
6/26/11
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没理解你的意思~~我的理解是,对任意一个矩形,能一刀砍成两块;初始时就一个矩形,问砍到最后能砍出多少钱。。。。
艾庆兴
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Jun 27, 2011, 2:15:56 AM
6/27/11
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不是从小到大来DP的么 = =,我是从小到大来DP的,是把布拼成大的,不是切的
MAT WETU
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Jun 27, 2011, 3:15:24 AM
6/27/11
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那可否麻烦贴个程序,或者跑下上面提到的那组数据
艾庆兴
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Jun 27, 2011, 6:47:56 AM
6/27/11
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额,马上期末考试了,好担心啊
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