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那答案为什么是3。。。

Posted by Mithril at 2006-10-21 14:56:31
In Reply To:Re:不明白 Posted by:CO2 at 2006-10-21 14:54:42 
> 
> 是不是唯一要看您找到的其他人的路径，是否存在1->4
> 边是无向边
> 1-2-3-4-1在样例里是一个圈
>
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