1 | /* -*- C++ -*- |
---|
2 | * |
---|
3 | * This file is a part of LEMON, a generic C++ optimization library |
---|
4 | * |
---|
5 | * Copyright (C) 2003-2006 |
---|
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 <iostream> |
---|
20 | #include <vector> |
---|
21 | |
---|
22 | #include <cmath> |
---|
23 | #include <cstdlib> |
---|
24 | |
---|
25 | #include <lemon/smart_graph.h> |
---|
26 | #include <lemon/dijkstra.h> |
---|
27 | #include <lemon/floyd_warshall.h> |
---|
28 | #include <lemon/johnson.h> |
---|
29 | |
---|
30 | #include <lemon/fib_heap.h> |
---|
31 | |
---|
32 | #include <lemon/time_measure.h> |
---|
33 | #include "test_tools.h" |
---|
34 | |
---|
35 | using namespace lemon; |
---|
36 | using namespace std; |
---|
37 | |
---|
38 | int main(int argc, const char *argv[]) { |
---|
39 | typedef SmartGraph Graph; |
---|
40 | typedef Graph::Node Node; |
---|
41 | typedef Graph::Edge Edge; |
---|
42 | typedef Graph::NodeIt NodeIt; |
---|
43 | typedef Graph::EdgeIt EdgeIt; |
---|
44 | |
---|
45 | typedef Graph::EdgeMap<int> LengthMap; |
---|
46 | typedef Graph::NodeMap<int> DistMap; |
---|
47 | |
---|
48 | const int n = argc > 1 ? atoi(argv[1]) : 20; |
---|
49 | const int e = argc > 2 ? atoi(argv[2]) : (int)(n * log((double)n)); |
---|
50 | const int m = argc > 3 ? atoi(argv[3]) : 100; |
---|
51 | |
---|
52 | Graph graph; |
---|
53 | LengthMap length(graph); |
---|
54 | vector<Node> nodes; |
---|
55 | |
---|
56 | DistMap shift(graph); |
---|
57 | for (int i = 0; i < n; ++i) { |
---|
58 | Node node = graph.addNode(); |
---|
59 | nodes.push_back(node); |
---|
60 | shift[node] = rnd[m]; |
---|
61 | } |
---|
62 | |
---|
63 | for (int i = 0; i < e; ++i) { |
---|
64 | int s = rnd[n]; |
---|
65 | int t = rnd[n]; |
---|
66 | Edge edge = graph.addEdge(nodes[s], nodes[t]); |
---|
67 | length[edge] = rnd[m] - shift[nodes[s]] + shift[nodes[t]]; |
---|
68 | } |
---|
69 | |
---|
70 | Johnson<Graph, LengthMap> johnson(graph, length); |
---|
71 | { |
---|
72 | Timer timer; |
---|
73 | johnson.run(); |
---|
74 | cout << "Johnson: " << timer << endl; |
---|
75 | } |
---|
76 | |
---|
77 | typedef FibHeap<int, Graph::NodeMap<int> > IntFibHeap; |
---|
78 | Johnson<Graph, LengthMap>::DefStandardHeap<IntFibHeap> |
---|
79 | ::Create fibJohnson(graph, length); |
---|
80 | { |
---|
81 | Timer timer; |
---|
82 | fibJohnson.run(); |
---|
83 | cout << "Johnson with fibonacci heap: " << timer << endl; |
---|
84 | } |
---|
85 | |
---|
86 | FloydWarshall<Graph, LengthMap> floyd(graph, length); |
---|
87 | { |
---|
88 | Timer timer; |
---|
89 | floyd.run(); |
---|
90 | cout << "FloydWarshall: " << timer << endl; |
---|
91 | } |
---|
92 | |
---|
93 | for (NodeIt it(graph); it != INVALID; ++it) { |
---|
94 | for (NodeIt jt(graph); jt != INVALID; ++jt) { |
---|
95 | check(johnson.connected(it, jt) == floyd.connected(it, jt), |
---|
96 | "Wrong connection in all pairs shortest path"); |
---|
97 | check(johnson.connected(it, jt) == fibJohnson.connected(it, jt), |
---|
98 | "Wrong connection in all pairs shortest path"); |
---|
99 | if (johnson.connected(it, jt)) { |
---|
100 | check(johnson.dist(it, jt) == floyd.dist(it, jt), |
---|
101 | "Wrong distance in all pairs shortest path"); |
---|
102 | check(johnson.dist(it, jt) == fibJohnson.dist(it, jt), |
---|
103 | "Wrong distance in all pairs shortest path"); |
---|
104 | if (it != jt) { |
---|
105 | check(johnson.dist(it, jt) == |
---|
106 | johnson.dist(it, johnson.predNode(it, jt)) + |
---|
107 | length[johnson.predEdge(it, jt)], |
---|
108 | "Wrong edge in all pairs shortest path"); |
---|
109 | check(fibJohnson.dist(it, jt) == |
---|
110 | fibJohnson.dist(it, fibJohnson.predNode(it, jt)) + |
---|
111 | length[fibJohnson.predEdge(it, jt)], |
---|
112 | "Wrong edge in all pairs shortest path"); |
---|
113 | check(floyd.dist(it, jt) == |
---|
114 | floyd.dist(it, floyd.predNode(it, jt)) + |
---|
115 | length[floyd.predEdge(it, jt)], |
---|
116 | "Wrong edge in all pairs shortest path"); |
---|
117 | } |
---|
118 | } |
---|
119 | } |
---|
120 | } |
---|
121 | |
---|
122 | return 0; |
---|
123 | } |
---|