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Re:是啊,解释一下

Posted by cglcgl21 at 2009-02-10 11:44:13 on Problem 3712
In Reply To:Re:是啊,解释一下 Posted by:ACM_Hohai at 2009-01-10 00:43:15
> 不存在k条边,并且这些边没公共定点……
还是不懂……是“不存在k条边,s.t.这些边两两没有公共点”吗?

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