1 | /* -*- C++ -*- |
---|

2 | * |
---|

3 | * This file is a part of LEMON, a generic C++ optimization library |
---|

4 | * |
---|

5 | * Copyright (C) 2003-2008 |
---|

6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|

7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|

8 | * |
---|

9 | * Permission to use, modify and distribute this software is granted |
---|

10 | * provided that this copyright notice appears in all copies. For |
---|

11 | * precise terms see the accompanying LICENSE file. |
---|

12 | * |
---|

13 | * This software is provided "AS IS" with no warranty of any kind, |
---|

14 | * express or implied, and with no claim as to its suitability for any |
---|

15 | * purpose. |
---|

16 | * |
---|

17 | */ |
---|

18 | |
---|

19 | #include<lemon/list_graph.h> |
---|

20 | |
---|

21 | #include"bench_tools.h" |
---|

22 | |
---|

23 | using namespace lemon; |
---|

24 | |
---|

25 | ///Makes a full graph by adding and deleting a lot of edges; |
---|

26 | |
---|

27 | ///\param n Number of nodes. |
---|

28 | ///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and |
---|

29 | ///\f$(rat-1)\timesn^2\f$ deletion. |
---|

30 | ///\param p Tuning parameters. |
---|

31 | ///\warning \c rat, \c p, and \c n must be pairwise relative primes. |
---|

32 | template <class Graph> |
---|

33 | void makeFullGraph(int n, int rat, int p) |
---|

34 | { |
---|

35 | GRAPH_TYPEDEFS(typename Graph); |
---|

36 | |
---|

37 | Graph G; |
---|

38 | |
---|

39 | // Node nodes[n]; |
---|

40 | std::vector<Node> nodes(n); |
---|

41 | for(int i=0;i<n;i++) nodes[i]=G.addNode(); |
---|

42 | |
---|

43 | //Edge equ[rat]; |
---|

44 | std::vector<Edge> equ(rat); |
---|

45 | |
---|

46 | /// \bug There is no long long int type in C++98. |
---|

47 | long long int count; |
---|

48 | |
---|

49 | for(count=0;count<rat;count++) { |
---|

50 | equ[int(count%rat)]=G.addEdge(nodes[int((count*p)%n)], |
---|

51 | nodes[int((count*p/n)%n)]); |
---|

52 | } |
---|

53 | for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) { |
---|

54 | // if(!(count%1000000)) fprintf(stderr,"%d\r",count); |
---|

55 | if(count%rat) G.erase(equ[count%rat]); |
---|

56 | equ[int(count%rat)]=G.addEdge(nodes[int((count*p)%n)], |
---|

57 | nodes[int((count*p/n)%n)]); |
---|

58 | } |
---|

59 | // std::cout << "Added " << count |
---|

60 | // << " ( " << n << "^2 * " << rat << " ) edges\n"; |
---|

61 | |
---|

62 | |
---|

63 | // for(int i=0;1;i++) ; |
---|

64 | } |
---|

65 | |
---|

66 | int main() |
---|

67 | { |
---|

68 | lemon::Timer T; |
---|

69 | makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100)); |
---|

70 | |
---|

71 | PrintTime("BIG",T); |
---|

72 | T.restart(); |
---|

73 | makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150)); |
---|

74 | |
---|

75 | PrintTime("SMALL",T); |
---|

76 | } |
---|