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Re:公式我找到了(程序也AC了)~可是意思还是不太理解,能提点一下在哪找到的公式,或者思路是怎样的吗?

Posted by ray58750034 at 2005-03-05 23:28:08 on Problem 2231
In Reply To:Re:可以O(n)的 Posted by:ArXoR at 2005-03-05 22:52:46


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