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wa很正常，因为你开始的代码本来就有问题

Posted by ljfljf2006 at 2009-10-22 08:16:34 on Problem 2425
In Reply To:关于这题，很无语！！！1 Posted by:nower at 2009-08-18 18:57:25 
你难道没发现flag是全局变量，而你在DFS里面再调用DFS，是会把以前存的flag给刷掉的？
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