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是一棵树? 也就是说m=n-1 ?

Posted by 1083_3 at 2006-12-09 20:04:24 on Problem 3140
In Reply To:Re:the organizing committee can only afford to set the system up such that there will be only one way to transfer information from one university to another without passing the same university twice. Posted by:006794 at 2006-12-09 19:54:05
> 关键的一句
>   表示它是一棵树

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