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原来只能向上走。。。

Posted by dragonghy at 2006-06-25 14:52:14 on Problem 2841
In Reply To:'So once you leave a grid, you cannot return to it. ' 怎么讲？是不是因此可能导致到不了奇数次F而No Solution? Posted by:dragonghy at 2006-06-25 14:36:57 



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