src/work/jacint/max_flow_bug.cc
changeset 1327 ecc1cdea2ee7
parent 921 818510fa3d99
equal deleted inserted replaced
2:38fcf19f64b1 3:72908976b4e9
    40   Graph::NodeMap<bool> mincut(G);
    40   Graph::NodeMap<bool> mincut(G);
    41   max_flow_test_no_stack.minMinCut(mincut); 
    41   max_flow_test_no_stack.minMinCut(mincut); 
    42   int min_min_cut_value=0;
    42   int min_min_cut_value=0;
    43   EdgeIt e;
    43   EdgeIt e;
    44   for(G.first(e); G.valid(e); G.next(e)) {
    44   for(G.first(e); G.valid(e); G.next(e)) {
    45     if (mincut[G.tail(e)] && !mincut[G.head(e)]) min_min_cut_value+=cap[e];
    45     if (mincut[G.source(e)] && !mincut[G.target(e)]) min_min_cut_value+=cap[e];
    46   }
    46   }
    47 
    47 
    48   Graph::NodeMap<bool> cut(G);
    48   Graph::NodeMap<bool> cut(G);
    49   max_flow_test_no_stack.minCut(cut); 
    49   max_flow_test_no_stack.minCut(cut); 
    50   int min_cut_value=0;
    50   int min_cut_value=0;
    51   for(G.first(e); G.valid(e); G.next(e)) {
    51   for(G.first(e); G.valid(e); G.next(e)) {
    52     if (cut[G.tail(e)] && !cut[G.head(e)]) 
    52     if (cut[G.source(e)] && !cut[G.target(e)]) 
    53       min_cut_value+=cap[e];
    53       min_cut_value+=cap[e];
    54   }
    54   }
    55 
    55 
    56   Graph::NodeMap<bool> maxcut(G);
    56   Graph::NodeMap<bool> maxcut(G);
    57   max_flow_test_no_stack.maxMinCut(maxcut); 
    57   max_flow_test_no_stack.maxMinCut(maxcut); 
    58   int max_min_cut_value=0;
    58   int max_min_cut_value=0;
    59   for(G.first(e); G.valid(e); G.next(e)) {
    59   for(G.first(e); G.valid(e); G.next(e)) {
    60     if (maxcut[G.tail(e)] && !maxcut[G.head(e)]) 
    60     if (maxcut[G.source(e)] && !maxcut[G.target(e)]) 
    61       max_min_cut_value+=cap[e];
    61       max_min_cut_value+=cap[e];
    62       }
    62       }
    63 
    63 
    64   std::cout << "\n Checking the result without stack: " <<std::endl;  
    64   std::cout << "\n Checking the result without stack: " <<std::endl;  
    65   std::cout << "Flow value: "<< max_flow_test_no_stack.flowValue() << std::endl;
    65   std::cout << "Flow value: "<< max_flow_test_no_stack.flowValue() << std::endl;
    86   
    86   
    87   Graph::NodeMap<bool> mincut2(G);
    87   Graph::NodeMap<bool> mincut2(G);
    88   max_flow_test.minMinCut(mincut2); 
    88   max_flow_test.minMinCut(mincut2); 
    89   int min_min_cut_value2=0;
    89   int min_min_cut_value2=0;
    90     for(G.first(e); G.valid(e); G.next(e)) {
    90     for(G.first(e); G.valid(e); G.next(e)) {
    91     if (mincut2[G.tail(e)] && !mincut2[G.head(e)]) min_min_cut_value2+=cap[e];
    91     if (mincut2[G.source(e)] && !mincut2[G.target(e)]) min_min_cut_value2+=cap[e];
    92   }
    92   }
    93 
    93 
    94   Graph::NodeMap<bool> cut2(G);
    94   Graph::NodeMap<bool> cut2(G);
    95   max_flow_test.minCut(cut2); 
    95   max_flow_test.minCut(cut2); 
    96   int min_cut_value2=0;
    96   int min_cut_value2=0;
    97   for(G.first(e); G.valid(e); G.next(e)) {
    97   for(G.first(e); G.valid(e); G.next(e)) {
    98     if (cut2[G.tail(e)] && !cut2[G.head(e)]) 
    98     if (cut2[G.source(e)] && !cut2[G.target(e)]) 
    99       min_cut_value2+=cap[e];
    99       min_cut_value2+=cap[e];
   100   }
   100   }
   101 
   101 
   102   Graph::NodeMap<bool> maxcut2(G);
   102   Graph::NodeMap<bool> maxcut2(G);
   103   max_flow_test.maxMinCut(maxcut2); 
   103   max_flow_test.maxMinCut(maxcut2); 
   104   int max_min_cut_value2=0;
   104   int max_min_cut_value2=0;
   105   for(G.first(e); G.valid(e); G.next(e)) {
   105   for(G.first(e); G.valid(e); G.next(e)) {
   106     if (maxcut2[G.tail(e)] && !maxcut2[G.head(e)]) 
   106     if (maxcut2[G.source(e)] && !maxcut2[G.target(e)]) 
   107       max_min_cut_value2+=cap[e];
   107       max_min_cut_value2+=cap[e];
   108       }
   108       }
   109   
   109   
   110   std::cout << "\n Checking the result: " <<std::endl;  
   110   std::cout << "\n Checking the result: " <<std::endl;  
   111   std::cout << "Flow value: "<< max_flow_test.flowValue() << std::endl;
   111   std::cout << "Flow value: "<< max_flow_test.flowValue() << std::endl;
   125   
   125   
   126   Graph::NodeMap<bool> mincut3(G);
   126   Graph::NodeMap<bool> mincut3(G);
   127   max_flow_test3.minMinCut(mincut3); 
   127   max_flow_test3.minMinCut(mincut3); 
   128   int min_min_cut_value3=0;
   128   int min_min_cut_value3=0;
   129   for(G.first(e); G.valid(e); G.next(e)) {
   129   for(G.first(e); G.valid(e); G.next(e)) {
   130     if (mincut3[G.tail(e)] && !mincut3[G.head(e)]) min_min_cut_value3+=cap[e];
   130     if (mincut3[G.source(e)] && !mincut3[G.target(e)]) min_min_cut_value3+=cap[e];
   131   }
   131   }
   132 
   132 
   133   Graph::NodeMap<bool> cut3(G);
   133   Graph::NodeMap<bool> cut3(G);
   134   max_flow_test3.minCut(cut3); 
   134   max_flow_test3.minCut(cut3); 
   135   int min_cut_value3=0;
   135   int min_cut_value3=0;
   136   for(G.first(e); G.valid(e); G.next(e)) {
   136   for(G.first(e); G.valid(e); G.next(e)) {
   137     if (cut3[G.tail(e)] && !cut3[G.head(e)]) 
   137     if (cut3[G.source(e)] && !cut3[G.target(e)]) 
   138       min_cut_value3+=cap[e];
   138       min_cut_value3+=cap[e];
   139   }
   139   }
   140 
   140 
   141   Graph::NodeMap<bool> maxcut3(G);
   141   Graph::NodeMap<bool> maxcut3(G);
   142   max_flow_test3.maxMinCut(maxcut3); 
   142   max_flow_test3.maxMinCut(maxcut3); 
   143   int max_min_cut_value3=0;
   143   int max_min_cut_value3=0;
   144   for(G.first(e); G.valid(e); G.next(e)) {
   144   for(G.first(e); G.valid(e); G.next(e)) {
   145     if (maxcut3[G.tail(e)] && !maxcut3[G.head(e)]) 
   145     if (maxcut3[G.source(e)] && !maxcut3[G.target(e)]) 
   146       max_min_cut_value3+=cap[e];
   146       max_min_cut_value3+=cap[e];
   147   }
   147   }
   148 
   148 
   149   std::cout << "\n Checking the result: " <<std::endl;  
   149   std::cout << "\n Checking the result: " <<std::endl;  
   150   std::cout << "Flow value: "<< max_flow_test3.flowValue() << std::endl;
   150   std::cout << "Flow value: "<< max_flow_test3.flowValue() << std::endl;