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为啥可以用bellman-ford算法啊?

Posted by maximdx at 2012-11-16 15:46:33 on Problem 1860
bellman-ford算法不是求“单源最短路径”?
但是题目要求最后还要回到原点s嘛?
求出来最赚的一条路还要回到s有可能就亏光了,不是吗?
求指点。

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