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这不叫O（n）...明明是N方，只不过一般没有最坏情况而已。。In Reply To:其实很水的，直接排个序就可以O(n)解决了。 Posted by:duanxian0621 at 2011-08-01 08:58:08 RT。。不过既然这样能过，我就不想写二分了。 Followed by:
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