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Re:是啊。负环没经过S也能过！！！

Posted by xtu715 at 2008-07-09 11:06:04 on Problem 1860
In Reply To:感觉这个题的数据有点弱 Posted by:ericsummer at 2006-05-05 22:49:11 
3 2 1 20.0
1 2 1.0 0.0 0.0 0.0
2 3 10.0 0.0 10.0 0.0

NO

没测这样的数据。
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