1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #include<lemon/list_graph.h> |
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20 | |
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21 | #include"bench_tools.h" |
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22 | |
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23 | using namespace lemon; |
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24 | |
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25 | ///Makes a full graph by adding and deleting a lot of edges; |
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26 | |
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27 | ///\param n Number of nodes. |
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28 | ///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and |
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29 | ///\f$(rat-1)\timesn^2\f$ deletion. |
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30 | ///\param p Tuning parameters. |
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31 | ///\warning \c rat, \c p, and \c n must be pairwise relative primes. |
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32 | template <class Graph> |
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33 | void makeFullGraph(int n, int rat, int p) |
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34 | { |
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35 | GRAPH_TYPEDEFS(typename Graph); |
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36 | |
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37 | Graph G; |
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38 | |
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39 | // Node nodes[n]; |
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40 | std::vector<Node> nodes(n); |
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41 | for(int i=0;i<n;i++) nodes[i]=G.addNode(); |
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42 | |
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43 | //Edge equ[rat]; |
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44 | std::vector<Edge> equ(rat); |
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45 | |
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46 | long long int count; |
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47 | |
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48 | for(count=0;count<rat;count++) { |
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49 | equ[int(count%rat)]=G.addEdge(nodes[int((count*p)%n)], |
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50 | nodes[int((count*p/n)%n)]); |
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51 | } |
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52 | for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) { |
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53 | // if(!(count%1000000)) fprintf(stderr,"%d\r",count); |
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54 | if(count%rat) G.erase(equ[count%rat]); |
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55 | equ[int(count%rat)]=G.addEdge(nodes[int((count*p)%n)], |
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56 | nodes[int((count*p/n)%n)]); |
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57 | } |
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58 | // std::cout << "Added " << count |
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59 | // << " ( " << n << "^2 * " << rat << " ) edges\n"; |
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60 | |
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61 | |
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62 | // for(int i=0;1;i++) ; |
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63 | } |
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64 | |
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65 | int main() |
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66 | { |
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67 | lemon::Timer T; |
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68 | makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100)); |
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69 | |
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70 | PrintTime("BIG",T); |
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71 | T.restart(); |
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72 | makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150)); |
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73 | |
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74 | PrintTime("SMALL",T); |
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75 | } |
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