4 #include <list_graph.hh>
6 #include <preflow_hl1.h>
7 #include <time_measure.h>
11 // Use a DIMACS max flow file as stdin.
12 // read_dimacs_demo < dimacs_max_flow_file
13 int main(int, char **) {
14 typedef ListGraph::NodeIt NodeIt;
15 typedef ListGraph::EachEdgeIt EachEdgeIt;
19 ListGraph::EdgeMap<int> cap(G);
20 readDimacsMaxFlow(std::cin, G, s, t, cap);
22 std::cout << "preflow_hl1 demo ..." << std::endl;
24 double mintime=1000000;
26 for ( int i=1; i!=11; ++i ) {
27 double pre_time=currTime();
28 preflow_hl1<ListGraph, int> max_flow_test(G, s, t, cap);
29 double post_time=currTime();
30 if ( mintime > post_time-pre_time ) mintime = post_time-pre_time;
33 double pre_time=currTime();
34 preflow_hl1<ListGraph, int> max_flow_test(G, s, t, cap);
35 double post_time=currTime();
37 ListGraph::NodeMap<bool> cut(G);
38 max_flow_test.minCut(cut);
40 for(EachEdgeIt e=G.first<EachEdgeIt>(); e.valid(); ++e) {
41 if (cut.get(G.tail(e)) && !cut.get(G.head(e))) min_cut_value+=cap.get(e);
44 ListGraph::NodeMap<bool> cut1(G);
45 max_flow_test.minMinCut(cut1);
46 int min_min_cut_value=0;
47 for(EachEdgeIt e=G.first<EachEdgeIt>(); e.valid(); ++e) {
48 if (cut.get(G.tail(e)) && !cut.get(G.head(e)))
49 min_min_cut_value+=cap.get(e);
52 ListGraph::NodeMap<bool> cut2(G);
53 max_flow_test.maxMinCut(cut2);
54 int max_min_cut_value=0;
55 for(EachEdgeIt e=G.first<EachEdgeIt>(); e.valid(); ++e) {
56 if (cut2.get(G.tail(e)) && !cut2.get(G.head(e)))
57 max_min_cut_value+=cap.get(e);
60 std::cout << "min time of 10 runs: " << mintime << " sec"<< std::endl;
61 std::cout << "phase 0: " << max_flow_test.time-pre_time
62 << " sec"<< std::endl;
63 std::cout << "phase 1: " << post_time-max_flow_test.time
64 << " sec"<< std::endl;
65 std::cout << "flow value: "<< max_flow_test.maxFlow() << std::endl;
66 std::cout << "min cut value: "<< min_cut_value << std::endl;
67 std::cout << "min min cut value: "<< min_min_cut_value << std::endl;
68 std::cout << "max min cut value: "<< max_min_cut_value <<
69 std::endl<< std::endl;