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应该是线段树哈。。。

Posted by richardxx at 2007-11-08 23:03:52 on Problem 2763
In Reply To:居然有一条链的啊..... Posted by:wqb0039 at 2007-11-08 21:51:42
> 请问在这种情况下怎么快速的求lca啊  谢谢.. 谢谢..

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