As we know, now there is efficient algorithms to find the overall min-cut in a directed graph, e.g. Hao and Orlin (1994). 2 e g9 C7 i7 V9 T! r+ k ' d! }3 [0 L4 ^1 n& c. XNow 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. ) M2 A6 d Z( M# w0 p% M
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* W' W$ E! f1 Q, C+ J8 b. ~0 S不好意思,我用英文至少为了把问题说的更清楚一点