As we know, now there is efficient algorithms to find the overall min-cut in a directed graph, e.g. Hao and Orlin (1994). z% e' w1 x ?. y8 n. J/ J8 k
* e# U! ^1 o& d4 F8 w5 t. r2 FNow 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. - C3 H0 @% ^9 t : q: u1 n6 n+ q3 a/ E4 Q: T - Y, w X V- ?2 b不好意思,我用英文至少为了把问题说的更清楚一点