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Re:这题有没有TRICK啊 我WA了

Posted by gdczcpy at 2010-02-06 14:58:52 on Problem 1741
In Reply To:这题有没有TRICK啊 我WA了 Posted by:wisdom at 2005-01-19 14:21:48 
> u,v,l在输进来的时候,是否u一定是v的父亲,可不可能v是u的父亲的?
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