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晕。。。理解错误了半天。。。笔记本没电了。。。明天再切。。。。。

Posted by c4pt0r at 2008-06-19 00:03:14 on Problem 2762
In Reply To:如果x->y有路,y->x无路,算task is possible吗? Posted by:Rexer at 2006-02-26 14:48:32


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