1 | #include <iostream> |
---|
2 | #include <vector> |
---|
3 | |
---|
4 | #include <cmath> |
---|
5 | #include <cstdlib> |
---|
6 | |
---|
7 | #include <lemon/smart_graph.h> |
---|
8 | #include <lemon/dijkstra.h> |
---|
9 | #include <lemon/floyd_warshall.h> |
---|
10 | #include <lemon/johnson.h> |
---|
11 | |
---|
12 | #include <lemon/time_measure.h> |
---|
13 | #include "test_tools.h" |
---|
14 | |
---|
15 | using namespace lemon; |
---|
16 | using namespace std; |
---|
17 | |
---|
18 | int main(int argc, const char *argv[]) { |
---|
19 | srand(time(0)); |
---|
20 | typedef SmartGraph Graph; |
---|
21 | typedef Graph::Node Node; |
---|
22 | typedef Graph::Edge Edge; |
---|
23 | typedef Graph::NodeIt NodeIt; |
---|
24 | typedef Graph::EdgeIt EdgeIt; |
---|
25 | |
---|
26 | typedef Graph::EdgeMap<double> LengthMap; |
---|
27 | typedef Graph::NodeMap<double> DistMap; |
---|
28 | |
---|
29 | const int n = argc > 1 ? atoi(argv[1]) : 20; |
---|
30 | const int e = argc > 2 ? atoi(argv[2]) : (int)(n * log((double)n)); |
---|
31 | const double m = argc > 3 ? (double)atoi(argv[3]) : 100.0; |
---|
32 | |
---|
33 | Graph graph; |
---|
34 | LengthMap length(graph); |
---|
35 | vector<Node> nodes; |
---|
36 | |
---|
37 | DistMap shift(graph); |
---|
38 | for (int i = 0; i < n; ++i) { |
---|
39 | Node node = graph.addNode(); |
---|
40 | nodes.push_back(node); |
---|
41 | shift[node] = m * (double)rand() / (RAND_MAX + 1.0); |
---|
42 | } |
---|
43 | |
---|
44 | for (int i = 0; i < e; ++i) { |
---|
45 | int s = (int)(n * (double)rand() / (RAND_MAX + 1.0)); |
---|
46 | int t = (int)(n * (double)rand() / (RAND_MAX + 1.0)); |
---|
47 | double c = m * (double)rand() / (RAND_MAX + 1.0); |
---|
48 | Edge edge = graph.addEdge(nodes[s], nodes[t]); |
---|
49 | length[edge] = c - shift[nodes[s]] + shift[nodes[t]]; |
---|
50 | } |
---|
51 | |
---|
52 | Johnson<Graph, LengthMap> johnson(graph, length); |
---|
53 | { |
---|
54 | Timer timer; |
---|
55 | johnson.run(); |
---|
56 | cout << "Johnson: " << timer << endl; |
---|
57 | } |
---|
58 | |
---|
59 | FloydWarshall<Graph, LengthMap> floyd(graph, length); |
---|
60 | { |
---|
61 | Timer timer; |
---|
62 | floyd.run(); |
---|
63 | cout << "FloydWarshall: " << timer << endl; |
---|
64 | } |
---|
65 | |
---|
66 | for (NodeIt it(graph); it != INVALID; ++it) { |
---|
67 | for (NodeIt jt(graph); jt != INVALID; ++jt) { |
---|
68 | check(johnson.connected(it, jt) == floyd.connected(it, jt), |
---|
69 | "Wrong connection in all pairs shortest path"); |
---|
70 | if (johnson.connected(it, jt)) { |
---|
71 | check(johnson.dist(it, jt) == floyd.dist(it, jt), |
---|
72 | "Wrong distance in all pairs shortest path"); |
---|
73 | if (it != jt) { |
---|
74 | check(johnson.dist(it, jt) == |
---|
75 | johnson.dist(it, johnson.predNode(it, jt)) + |
---|
76 | length[johnson.pred(it, jt)], |
---|
77 | "Wrong edge in all pairs shortest path"); |
---|
78 | check(floyd.dist(it, jt) == |
---|
79 | floyd.dist(it, floyd.predNode(it, jt)) + |
---|
80 | length[floyd.pred(it, jt)], |
---|
81 | "Wrong edge in all pairs shortest path"); |
---|
82 | } |
---|
83 | } |
---|
84 | } |
---|
85 | } |
---|
86 | |
---|
87 | return 0; |
---|
88 | } |
---|