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Re:雁过留声——最大费用流

Posted by weihaohaoren at 2012-01-26 19:50:28 on Problem 3422
In Reply To:雁过留声——最大费用流 Posted by:fanhqme at 2009-11-29 19:50:08
一个格子向右和下方向的边的费用不能为0,因为这样dis[v]<dis[v]+e[u][v]就会导致不成立,但是实际上不是每一条边上都要有费用

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