As we know, now there is efficient algorithms to find the overall min-cut in a directed graph, e.g. Hao and Orlin (1994). - |5 V$ m# K' s( X6 _/ | 5 c$ `& G5 R7 cNow my problem is to find an overall min-cut just separating some given node pairs, not all the node pairs. For example, I have an 8-node digraph with capacities on each arc and want to find the overall min-cut separating some node pairs such as 8 and 1, 6 and 3, 7 and 1. The algorithm of Hao and Orlin (1994) cannot solve my problem. ; W$ p9 e# g7 A7 s% D v) y
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8 _5 ^1 @- T5 ^0 e. y1 K. r: I不好意思,我用英文至少为了把问题说的更清楚一点