1 | // -*- c++ -*- |
---|
2 | #include <iostream> |
---|
3 | #include <fstream> |
---|
4 | #include <string> |
---|
5 | |
---|
6 | #include <list_graph.h> |
---|
7 | #include <smart_graph.h> |
---|
8 | #include <dimacs.h> |
---|
9 | #include <edmonds_karp.h> |
---|
10 | #include <preflow.h> |
---|
11 | #include <time_measure.h> |
---|
12 | #include <for_each_macros.h> |
---|
13 | |
---|
14 | using namespace hugo; |
---|
15 | |
---|
16 | // Use a DIMACS max flow file as stdin. |
---|
17 | // read_dimacs_demo dimacs_max_flow_file |
---|
18 | |
---|
19 | int main(int, char** argv) { |
---|
20 | |
---|
21 | std::string in=argv[1]; |
---|
22 | typedef ListGraph MutableGraph; |
---|
23 | |
---|
24 | { |
---|
25 | typedef ListGraph Graph; |
---|
26 | typedef Graph::Node Node; |
---|
27 | typedef Graph::EdgeIt EdgeIt; |
---|
28 | |
---|
29 | Graph G; |
---|
30 | Node s, t; |
---|
31 | Graph::EdgeMap<int> cap(G); |
---|
32 | std::ifstream ins(in.c_str()); |
---|
33 | readDimacsMaxFlow(ins, G, s, t, cap); |
---|
34 | |
---|
35 | Timer ts; |
---|
36 | Graph::EdgeMap<int> flow(G); //0 flow |
---|
37 | Preflow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > |
---|
38 | pre_flow_test(G, s, t, cap, flow); |
---|
39 | MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > |
---|
40 | max_flow_test(G, s, t, cap, flow); |
---|
41 | |
---|
42 | std::cout << "ListGraph ..." << std::endl; |
---|
43 | |
---|
44 | { |
---|
45 | std::cout << "preflow ..." << std::endl; |
---|
46 | ts.reset(); |
---|
47 | pre_flow_test.run(); |
---|
48 | std::cout << "elapsed time: " << ts << std::endl; |
---|
49 | std::cout << "flow value: "<< pre_flow_test.flowValue() << std::endl; |
---|
50 | } |
---|
51 | |
---|
52 | { |
---|
53 | std::cout << "physical blocking flow augmentation ..." << std::endl; |
---|
54 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
55 | ts.reset(); |
---|
56 | int i=0; |
---|
57 | while (max_flow_test.augmentOnBlockingFlow<MutableGraph>()) { ++i; } |
---|
58 | std::cout << "elapsed time: " << ts << std::endl; |
---|
59 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
60 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
61 | } |
---|
62 | |
---|
63 | { |
---|
64 | std::cout << "faster physical blocking flow augmentation ..." << std::endl; |
---|
65 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
66 | ts.reset(); |
---|
67 | int i=0; |
---|
68 | while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) { ++i; } |
---|
69 | std::cout << "elapsed time: " << ts << std::endl; |
---|
70 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
71 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
72 | } |
---|
73 | |
---|
74 | { |
---|
75 | std::cout << "on-the-fly blocking flow augmentation ..." << std::endl; |
---|
76 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
77 | ts.reset(); |
---|
78 | int i=0; |
---|
79 | while (max_flow_test.augmentOnBlockingFlow2()) { ++i; } |
---|
80 | std::cout << "elapsed time: " << ts << std::endl; |
---|
81 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
82 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
83 | } |
---|
84 | |
---|
85 | { |
---|
86 | std::cout << "on-the-fly shortest path augmentation ..." << std::endl; |
---|
87 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
88 | ts.reset(); |
---|
89 | int i=0; |
---|
90 | while (max_flow_test.augmentOnShortestPath()) { ++i; } |
---|
91 | std::cout << "elapsed time: " << ts << std::endl; |
---|
92 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
93 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
94 | } |
---|
95 | } |
---|
96 | |
---|
97 | |
---|
98 | { |
---|
99 | typedef SmartGraph Graph; |
---|
100 | typedef Graph::Node Node; |
---|
101 | typedef Graph::EdgeIt EdgeIt; |
---|
102 | |
---|
103 | Graph G; |
---|
104 | Node s, t; |
---|
105 | Graph::EdgeMap<int> cap(G); |
---|
106 | std::ifstream ins(in.c_str()); |
---|
107 | readDimacsMaxFlow(ins, G, s, t, cap); |
---|
108 | |
---|
109 | Timer ts; |
---|
110 | Graph::EdgeMap<int> flow(G); //0 flow |
---|
111 | Preflow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > |
---|
112 | pre_flow_test(G, s, t, cap, flow); |
---|
113 | MaxFlow<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > |
---|
114 | max_flow_test(G, s, t, cap, flow); |
---|
115 | |
---|
116 | std::cout << "SmatrGraph ..." << std::endl; |
---|
117 | |
---|
118 | { |
---|
119 | std::cout << "preflow ..." << std::endl; |
---|
120 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
121 | ts.reset(); |
---|
122 | pre_flow_test.run(); |
---|
123 | std::cout << "elapsed time: " << ts << std::endl; |
---|
124 | std::cout << "flow value: "<< pre_flow_test.flowValue() << std::endl; |
---|
125 | } |
---|
126 | |
---|
127 | { |
---|
128 | std::cout << "physical blocking flow augmentation ..." << std::endl; |
---|
129 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
130 | ts.reset(); |
---|
131 | int i=0; |
---|
132 | while (max_flow_test.augmentOnBlockingFlow<MutableGraph>()) { ++i; } |
---|
133 | std::cout << "elapsed time: " << ts << std::endl; |
---|
134 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
135 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
136 | } |
---|
137 | |
---|
138 | { |
---|
139 | std::cout << "faster physical blocking flow augmentation ..." << std::endl; |
---|
140 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
141 | ts.reset(); |
---|
142 | int i=0; |
---|
143 | while (max_flow_test.augmentOnBlockingFlow1<MutableGraph>()) { ++i; } |
---|
144 | std::cout << "elapsed time: " << ts << std::endl; |
---|
145 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
146 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
147 | } |
---|
148 | |
---|
149 | { |
---|
150 | std::cout << "on-the-fly blocking flow augmentation ..." << std::endl; |
---|
151 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
152 | ts.reset(); |
---|
153 | int i=0; |
---|
154 | while (max_flow_test.augmentOnBlockingFlow2()) { ++i; } |
---|
155 | std::cout << "elapsed time: " << ts << std::endl; |
---|
156 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
157 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
158 | } |
---|
159 | |
---|
160 | { |
---|
161 | std::cout << "on-the-fly shortest path augmentation ..." << std::endl; |
---|
162 | FOR_EACH_LOC(Graph::EdgeIt, e, G) flow.set(e, 0); |
---|
163 | ts.reset(); |
---|
164 | int i=0; |
---|
165 | while (max_flow_test.augmentOnShortestPath()) { ++i; } |
---|
166 | std::cout << "elapsed time: " << ts << std::endl; |
---|
167 | std::cout << "number of augmentation phases: " << i << std::endl; |
---|
168 | std::cout << "flow value: "<< max_flow_test.flowValue() << std::endl; |
---|
169 | } |
---|
170 | } |
---|
171 | |
---|
172 | |
---|
173 | |
---|
174 | |
---|
175 | return 0; |
---|
176 | } |
---|