1 | // -*- c++ -*- |
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2 | #include <iostream> |
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3 | #include <fstream> |
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4 | |
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5 | //#include <sage_graph.h> |
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6 | #include <lemon/smart_graph.h> |
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7 | #include <lemon/list_graph.h> |
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8 | #include <lemon/dimacs.h> |
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9 | #include <lemon/time_measure.h> |
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10 | //#include <lemon/for_each_macros.h> |
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11 | #include <bfs_mm.h> |
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12 | #include <lemon/bfs.h> |
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13 | |
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14 | using namespace lemon; |
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15 | |
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16 | using std::cout; |
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17 | using std::endl; |
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18 | |
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19 | int main() { |
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20 | // typedef SageGraph Graph; |
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21 | typedef SmartGraph Graph ; |
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22 | //typedef ListGraph Graph; |
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23 | typedef Graph::Node Node; |
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24 | typedef Graph::NodeIt NodeIt; |
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25 | typedef Graph::Edge Edge; |
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26 | typedef Graph::EdgeIt EdgeIt; |
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27 | typedef Graph::OutEdgeIt OutEdgeIt; |
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28 | |
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29 | Graph g; |
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30 | readDimacs(std::cin, g); |
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31 | NodeIt s(g); |
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32 | |
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33 | cout << g.nodeNum() << endl; |
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34 | cout << g.edgeNum() << endl; |
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35 | |
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36 | Graph::NodeMap<Edge> pred(g); |
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37 | cout << "iteration time of bfs written by hand..." << endl; |
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38 | Timer ts; |
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39 | ts.reset(); |
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40 | for (int i=0; i<100; ++i) |
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41 | { |
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42 | Graph::NodeMap<bool> reached(g); |
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43 | reached.set(s, true); |
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44 | pred.set(s, INVALID); |
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45 | std::queue<Node> bfs_queue; |
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46 | bfs_queue.push(s); |
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47 | while (!bfs_queue.empty()) { |
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48 | Node v=bfs_queue.front(); |
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49 | bfs_queue.pop(); |
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50 | for(OutEdgeIt e(g,v); e!=INVALID; ++e) { |
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51 | Node w=g.head(e); |
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52 | if (!reached[w]) { |
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53 | bfs_queue.push(w); |
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54 | reached.set(w, true); |
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55 | pred.set(w, e); |
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56 | } |
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57 | } |
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58 | } |
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59 | } |
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60 | std::cout << ts << std::endl; |
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61 | |
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62 | cout << "iteration time with bfs iterator..." << endl; |
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63 | ts.reset(); |
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64 | for (int i=0; i<100; ++i) |
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65 | { |
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66 | Graph::NodeMap<bool> reached(g); |
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67 | marci::BfsIterator< Graph, Graph::NodeMap<bool> > bfs(g, reached); |
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68 | bfs.pushAndSetReached(s); |
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69 | pred.set(s, INVALID); |
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70 | while (!bfs.finished()) { |
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71 | ++bfs; |
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72 | if (Graph::Edge(bfs)!=INVALID && bfs.isBNodeNewlyReached()) |
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73 | pred.set(bfs.head(), Graph::Edge(bfs)); |
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74 | } |
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75 | } |
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76 | std::cout << ts << std::endl; |
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77 | |
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78 | cout << "iteration time with bfs aplar..." << endl; |
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79 | ts.reset(); |
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80 | for (int i=0; i<100; ++i) |
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81 | { |
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82 | Bfs<Graph> bfs(g); |
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83 | bfs.setPredMap(pred); |
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84 | bfs.run(s); |
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85 | } |
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86 | std::cout << ts << std::endl; |
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87 | |
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88 | |
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89 | return 0; |
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90 | } |
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