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我用bellman-ford做了，但是总是WA，考虑了v=0的情况。faint中……

Posted by stars at 2005-03-22 22:51:15 on Problem 1860
In Reply To:Bellman-Ford，求一次最短路，再判一次负环就可以了 Posted by:xiaomi at 2004-09-30 16:31:08 
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