# HG changeset patch
# User marci
# Date 1082973331 0
# Node ID d137525538dccc431eec74e382124b0bb5af0942
# Parent  7ab7f083760a4d7f0ab3145182e1dfd09dbba77b
as you see...

diff -r 7ab7f083760a -r d137525538dc src/work/marci/bipartite_matching_try.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/work/marci/bipartite_matching_try.cc	Mon Apr 26 09:55:31 2004 +0000
@@ -0,0 +1,194 @@
+// -*- c++ -*-
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <cstdlib>
+
+#include <list_graph.h>
+//#include <smart_graph.h>
+//#include <dimacs.h>
+#include <time_measure.h>
+#include <for_each_macros.h>
+#include <bfs_iterator.h>
+#include <graph_wrapper.h>
+#include <maps.h>
+#include <edmonds_karp.h>
+#include <preflow.h>
+
+/**
+ * Inicializalja a veletlenszamgeneratort.
+ * Figyelem, ez nem jo igazi random szamokhoz,
+ * erre ne bizzad a titkaidat!
+ */
+void random_init()
+{
+	unsigned int seed = getpid();
+	seed |= seed << 15;
+	seed ^= time(0);
+
+	srand(seed);
+}
+
+/**
+ * Egy veletlen int-et ad vissza 0 es m-1 kozott.
+ */
+int random(int m)
+{
+  return int( double(m) * rand() / (RAND_MAX + 1.0) );
+}
+
+using namespace hugo;
+
+int main() {
+  typedef UndirListGraph Graph; 
+  typedef Graph::Node Node;
+  typedef Graph::NodeIt NodeIt;
+  typedef Graph::Edge Edge;
+  typedef Graph::EdgeIt EdgeIt;
+  typedef Graph::OutEdgeIt OutEdgeIt;
+
+  Graph g;
+
+  std::vector<Graph::Node> s_nodes;
+  std::vector<Graph::Node> t_nodes;
+
+  int a;
+  std::cout << "number of nodes in the first color class=";
+  std::cin >> a; 
+  int b;
+  std::cout << "number of nodes in the second color class=";
+  std::cin >> b; 
+  int m;
+  std::cout << "number of edges=";
+  std::cin >> m; 
+  
+
+  for (int i=0; i<a; ++i) s_nodes.push_back(g.addNode());
+  for (int i=0; i<b; ++i) t_nodes.push_back(g.addNode());
+
+  random_init();
+  for(int i=0; i<m; ++i) {
+    g.addEdge(s_nodes[random(a)], t_nodes[random(b)]);
+  }
+
+  Graph::NodeMap<int> ref_map(g, -1);
+
+  IterableBoolMap< Graph::NodeMap<int> > bipartite_map(ref_map);
+  for (int i=0; i<a; ++i) bipartite_map.insert(s_nodes[i], false);
+  for (int i=0; i<b; ++i) bipartite_map.insert(t_nodes[i], true);
+
+//   Graph::Node u;
+//   std::cout << "These nodes will be in S:\n";
+//   //FIXME azert kellene ++, es invalid vizsgalat u-bol, hogy ezt le lehessen 
+//   //irni 1etlen FOR_EACH-csel.
+//   for (bipartite_map.first(u, false); g.valid(u); bipartite_map.next(u)) 
+//     std::cout << u << " ";
+//   std::cout << "\n";
+//   std::cout << "These nodes will be in T:\n";
+//   for (bipartite_map.first(u, true); g.valid(u); bipartite_map.next(u)) 
+//     std::cout << u << " ";
+//   std::cout << "\n";
+
+  typedef BipartiteGraphWrapper<Graph> BGW;
+  BGW bgw(g, bipartite_map);
+
+//   std::cout << "Nodes by NodeIt:\n";
+//   FOR_EACH_LOC(BGW::NodeIt, n, bgw) {
+//     std::cout << n << " ";
+//   }
+//   std::cout << "\n";
+//   std::cout << "Nodes in S by ClassNodeIt:\n";
+//   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.S_CLASS) {
+//     std::cout << n << " ";
+//   }
+//   std::cout << "\n";
+//   std::cout << "Nodes in T by ClassNodeIt:\n";
+//   FOR_EACH_INC_LOC(BGW::ClassNodeIt, n, bgw, bgw.T_CLASS) {
+//     std::cout << n << " ";
+//   }
+//   std::cout << "\n";
+//   std::cout << "Edges of the bipartite graph:\n";
+//   FOR_EACH_LOC(BGW::EdgeIt, e, bgw) {
+//     std::cout << bgw.tail(e) << "->" << bgw.head(e) << std::endl;
+//   }
+
+  BGW::NodeMap<int> dbyj(bgw);
+  BGW::EdgeMap<int> dbyxcj(bgw);
+
+  typedef stGraphWrapper<BGW> stGW;
+  stGW stgw(bgw);
+  ConstMap<stGW::Edge, int> const1map(1);
+//  stGW::NodeMap<int> ize(stgw);
+
+//   BfsIterator< BGW, BGW::NodeMap<bool> > bfs(bgw);
+//   Graph::NodeIt si;
+//   Graph::Node s; 
+//   s=g.first(si);
+//   bfs.pushAndSetReached(BGW::Node(s));
+//   while (!bfs.finished()) { ++bfs; }
+
+//   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 
+//     std::cout << "out-edges of " << n << ":\n"; 
+//     FOR_EACH_INC_LOC(stGW::OutEdgeIt, e, stgw, n) { 
+//       std::cout << " " << e << "\n";
+//       std::cout << " aNode: " << stgw.aNode(e) << "\n";
+//       std::cout << " bNode: " << stgw.bNode(e) << "\n";      
+//     }
+//     std::cout << "in-edges of " << n << ":\n"; 
+//     FOR_EACH_INC_LOC(stGW::InEdgeIt, e, stgw, n) { 
+//       std::cout << " " << e << "\n";
+//       std::cout << " aNode: " << stgw.aNode(e) << "\n";
+//       std::cout << " bNode: " << stgw.bNode(e) << "\n";     
+//     }
+//   }
+//   std::cout << "Edges of the stGraphWrapper:\n"; 
+//   FOR_EACH_LOC(stGW::EdgeIt, n, stgw) { 
+//     std::cout << " " << n << "\n";
+//   }
+
+//   stGW::NodeMap<bool> b(stgw);
+//   FOR_EACH_LOC(stGW::NodeIt, n, stgw) { 
+//     std::cout << n << ": " << b[n] <<"\n";
+//   }
+
+//   std::cout << "Bfs from s: \n";
+//   BfsIterator< stGW, stGW::NodeMap<bool> > bfs_stgw(stgw);
+//   bfs_stgw.pushAndSetReached(stgw.S_NODE);
+//   while (!bfs_stgw.finished()) { 
+//     std::cout << " " << stGW::OutEdgeIt(bfs_stgw) << "\n";
+//     ++bfs_stgw; 
+//   }
+
+
+  Timer ts;
+  ts.reset();
+  stGW::EdgeMap<int> max_flow(stgw);
+  MaxFlow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > 
+    max_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, max_flow);
+//  while (max_flow_test.augmentOnShortestPath()) { }
+  typedef ListGraph MutableGraph;
+//  while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) {
+  while (max_flow_test.augmentOnBlockingFlow2()) {
+   std::cout << max_flow_test.flowValue() << std::endl;
+  }
+  std::cout << "max flow value: " << max_flow_test.flowValue() << std::endl;
+  std::cout << "elapsed time: " << ts << std::endl;
+//   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { 
+//     std::cout << e << ": " << max_flow[e] << "\n"; 
+//   }
+//   std::cout << "\n";
+
+  ts.reset();
+  stGW::EdgeMap<int> pre_flow(stgw);
+  Preflow<stGW, int, ConstMap<stGW::Edge, int>, stGW::EdgeMap<int> > 
+    pre_flow_test(stgw, stgw.S_NODE, stgw.T_NODE, const1map, pre_flow, true);
+  pre_flow_test.run();
+  std::cout << "pre flow value: " << max_flow_test.flowValue() << std::endl;
+  std::cout << "elapsed time: " << ts << std::endl;
+//   FOR_EACH_LOC(stGW::EdgeIt, e, stgw) { 
+//     std::cout << e << ": " << pre_flow[e] << "\n"; 
+//   }
+//   std::cout << "\n";
+
+  return 0;
+}