# HG changeset patch
# User jacint
# Date 1084039423 0
# Node ID 510cf257e6f2135956ac1d261a13b4f5454407d2
# Parent  266fa11f222bcfa5dafab493eaca4f1be07124ef
felkesz tesztprogi

diff -r 266fa11f222b -r 510cf257e6f2 src/work/jacint/max_flow_test.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/work/jacint/max_flow_test.cc	Sat May 08 18:03:43 2004 +0000
@@ -0,0 +1,157 @@
+#include <iostream>
+
+#include <list_graph.h>
+#include <dimacs.h>
+#include <max_flow.h>
+#include <time_measure.h>
+
+using namespace hugo;
+
+int main(int, char **) {
+ 
+  typedef ListGraph Graph;
+  
+  typedef Graph::Node Node;
+  typedef Graph::EdgeIt EdgeIt;
+
+  Graph G;
+  Node s, t;
+  Graph::EdgeMap<int> cap(G);
+  readDimacs(std::cin, G, cap, s, t);
+  Timer ts;
+  
+  std::cout <<
+    "\n  Running max_flow.h on a graph with " << 
+    G.nodeNum() << " nodes and " << G.edgeNum() << " edges..."
+	   << std::endl<<std::endl;
+
+  Graph::EdgeMap<int> flow(G,0);
+  MaxFlow<Graph, int> max_flow_test(G, s, t, cap, flow);
+  ts.reset();
+  max_flow_test.run();
+  std::cout << "Elapsed time of run(): " << std::endl 
+	    <<ts << std::endl;
+  
+  Graph::NodeMap<bool> mincut(G);
+  max_flow_test.minMinCut(mincut); 
+  int min_min_cut_value=0;
+  EdgeIt e;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (mincut[G.tail(e)] && !mincut[G.head(e)]) min_min_cut_value+=cap[e];
+  }
+
+  Graph::NodeMap<bool> cut(G);
+  max_flow_test.minCut(cut); 
+  int min_cut_value=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (cut[G.tail(e)] && !cut[G.head(e)]) 
+      min_cut_value+=cap[e];
+  }
+
+  Graph::NodeMap<bool> maxcut(G);
+  max_flow_test.maxMinCut(maxcut); 
+  int max_min_cut_value=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (maxcut[G.tail(e)] && !maxcut[G.head(e)]) 
+      max_min_cut_value+=cap[e];
+      }
+
+  std::cout << "\n Checking the result: " <<std::endl;  
+  std::cout << "Flow value: "<< max_flow_test.flowValue() << std::endl;
+  std::cout << "Min cut value: "<< min_cut_value << std::endl;
+  std::cout << "Min min cut value: "<< min_min_cut_value << std::endl;
+  std::cout << "Max min cut value: "<< max_min_cut_value << 
+    std::endl;
+
+  if ( max_flow_test.flowValue() == min_cut_value &&
+       min_cut_value == min_min_cut_value &&
+       min_min_cut_value == max_min_cut_value )
+    std::cout << "They are equal! " <<std::endl<< std::endl<<"\n";  
+
+
+
+  Graph::EdgeMap<int> flow2(G,0);
+  std::cout << "Calling resetFlow() " << std::endl 
+	    << ts << std::endl;
+  max_flow_test.resetFlow(flow2);  
+  ts.reset();
+  max_flow_test.preflow(max_flow_test.PRE_FLOW);
+  std::cout << "Elapsed time of preflow(PRE_FLOW) starting from the zero flow: " << std::endl 
+	    << ts << std::endl;
+  
+  Graph::NodeMap<bool> mincut2(G);
+  max_flow_test.minMinCut(mincut2); 
+  int min_min_cut_value2=0;
+    for(G.first(e); G.valid(e); G.next(e)) {
+    if (mincut2[G.tail(e)] && !mincut2[G.head(e)]) min_min_cut_value2+=cap[e];
+  }
+
+  Graph::NodeMap<bool> cut2(G);
+  max_flow_test.minCut(cut2); 
+  int min_cut_value2=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (cut2[G.tail(e)] && !cut2[G.head(e)]) 
+      min_cut_value2+=cap[e];
+  }
+
+  Graph::NodeMap<bool> maxcut2(G);
+  max_flow_test.maxMinCut(maxcut2); 
+  int max_min_cut_value2=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (maxcut2[G.tail(e)] && !maxcut2[G.head(e)]) 
+      max_min_cut_value2+=cap[e];
+      }
+  
+  std::cout << "\n Checking the result: " <<std::endl;  
+  std::cout << "Flow value: "<< max_flow_test.flowValue() << std::endl;
+  std::cout << "Min cut value: "<< min_cut_value2 << std::endl;
+  std::cout << "Min min cut value: "<< min_min_cut_value2 << std::endl;
+  std::cout << "Max min cut value: "<< max_min_cut_value2 << 
+    std::endl;  
+  if ( max_flow_test.flowValue() == min_cut_value &&
+       min_cut_value == min_min_cut_value &&
+       min_min_cut_value == max_min_cut_value )
+    std::cout << "They are equal! " <<std::endl;  
+
+
+  MaxFlow<Graph, int> max_flow_test3(G, s, t, cap, flow2);
+  max_flow_test3.run(max_flow_test3.GEN_FLOW);
+  std::cout << "Calling run(GEN_FLOW) from the max flow found before. " <<std::endl;  
+  
+  Graph::NodeMap<bool> mincut3(G);
+  max_flow_test3.minMinCut(mincut3); 
+  int min_min_cut_value3=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (mincut3[G.tail(e)] && !mincut3[G.head(e)]) min_min_cut_value3+=cap[e];
+  }
+
+  Graph::NodeMap<bool> cut3(G);
+  max_flow_test3.minCut(cut3); 
+  int min_cut_value3=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (cut3[G.tail(e)] && !cut3[G.head(e)]) 
+      min_cut_value3+=cap[e];
+  }
+
+  Graph::NodeMap<bool> maxcut3(G);
+  max_flow_test3.maxMinCut(maxcut3); 
+  int max_min_cut_value3=0;
+  for(G.first(e); G.valid(e); G.next(e)) {
+    if (maxcut3[G.tail(e)] && !maxcut3[G.head(e)]) 
+      max_min_cut_value3+=cap[e];
+  }
+
+  std::cout << "\n Checking the result: " <<std::endl;  
+  std::cout << "Flow value: "<< max_flow_test3.flowValue() << std::endl;
+  std::cout << "Min cut value: "<< min_cut_value3 << std::endl;
+  std::cout << "Min min cut value: "<< min_min_cut_value3 << std::endl;
+  std::cout << "Max min cut value: "<< max_min_cut_value3 << 
+    std::endl;
+
+  if ( max_flow_test3.flowValue() == min_cut_value3 &&
+       min_cut_value3 == min_min_cut_value3 &&
+       min_min_cut_value3 == max_min_cut_value3 )
+    std::cout << "They are equal! " <<std::endl<< std::endl<<"\n";  
+  
+  return 0;
+}