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Re:这题会不会有impossible啊?

Posted by kaikai at 2003-11-08 14:36:44 on Problem 1536
In Reply To:这题会不会有impossible啊? Posted by:Sonnet at 2003-11-07 21:44:33 
有可能的吧...
火车全连在一起的时候应该是impossible的。
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