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我只能想到O(n^2)的，昨天比赛时还写废了。。期待好办法。。

Posted by richardxx at 2007-10-25 08:35:56 on Problem 3431
In Reply To:请教下这题怎么做才快啊。。 Posted by:hhb at 2007-10-25 08:34:24

rt

Followed by:

这也太nb了吧，我抓破脑袋也只能想到0(n^3)的。 (6) porsche 2007-10-25 08:50:13
Re:我只能想到O(n^2)的，昨天比赛时还写废了。。期待好办法。。 (13) charlescpp 2007-10-25 09:03:41
- 看yangyi的论文。。 (11) richardxx 2007-10-25 09:36:41
  - 哪有…… (0) hhb 2007-10-25 09:47:11
我们用了个unsigned char 才过，幸亏是像素，n^2的怎么搞啊 (6) xiaox 2007-10-25 10:14:02

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