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一般来说边上就是3个，角上就是2个

Posted by frkstyc at 2006-06-25 14:44:49 on Problem 2843
In Reply To:Re:Questions about the problem of G Posted by:cnhawk at 2006-06-25 14:43:18 
> 恩啊，请大牛详细解释吧，我是新人，概念不是很懂啊...
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