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Diffstat (limited to 'src/boost/libs/graph/example/boykov_kolmogorov-eg.cpp')
| -rw-r--r-- | src/boost/libs/graph/example/boykov_kolmogorov-eg.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/boykov_kolmogorov-eg.cpp b/src/boost/libs/graph/example/boykov_kolmogorov-eg.cpp new file mode 100644 index 000000000..5dd8d03e4 --- /dev/null +++ b/src/boost/libs/graph/example/boykov_kolmogorov-eg.cpp @@ -0,0 +1,114 @@ +// Copyright (c) 2006, Stephan Diederich +// +// This code may be used under either of the following two licences: +// +// Permission is hereby granted, free of charge, to any person +// obtaining a copy of this software and associated documentation +// files (the "Software"), to deal in the Software without +// restriction, including without limitation the rights to use, +// copy, modify, merge, publish, distribute, sublicense, and/or +// sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following +// conditions: +// +// The above copyright notice and this permission notice shall be +// included in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES +// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT +// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +// OTHER DEALINGS IN THE SOFTWARE. OF SUCH DAMAGE. +// +// Or: +// +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) + +#include <boost/config.hpp> +#include <iostream> +#include <string> +#include <boost/graph/adjacency_list.hpp> +#include <boost/graph/boykov_kolmogorov_max_flow.hpp> +#include <boost/graph/read_dimacs.hpp> +#include <boost/graph/graph_utility.hpp> + +// Use a DIMACS network flow file as stdin. +// boykov_kolmogorov-eg < max_flow.dat +// +// Sample output: +// c The total flow: +// s 13 +// +// c flow values: +// f 0 6 3 +// f 0 1 6 +// f 0 2 4 +// f 1 5 1 +// f 1 0 0 +// f 1 3 5 +// f 2 4 4 +// f 2 3 0 +// f 2 0 0 +// f 3 7 5 +// f 3 2 0 +// f 3 1 0 +// f 4 5 0 +// f 4 6 4 +// f 5 4 0 +// f 5 7 1 +// f 6 7 7 +// f 6 4 0 +// f 7 6 0 +// f 7 5 0 + +int main() +{ + using namespace boost; + + typedef adjacency_list_traits< vecS, vecS, directedS > Traits; + typedef adjacency_list< vecS, vecS, directedS, + property< vertex_name_t, std::string, + property< vertex_index_t, long, + property< vertex_color_t, boost::default_color_type, + property< vertex_distance_t, long, + property< vertex_predecessor_t, + Traits::edge_descriptor > > > > >, + + property< edge_capacity_t, long, + property< edge_residual_capacity_t, long, + property< edge_reverse_t, Traits::edge_descriptor > > > > + Graph; + + Graph g; + property_map< Graph, edge_capacity_t >::type capacity + = get(edge_capacity, g); + property_map< Graph, edge_residual_capacity_t >::type residual_capacity + = get(edge_residual_capacity, g); + property_map< Graph, edge_reverse_t >::type rev = get(edge_reverse, g); + Traits::vertex_descriptor s, t; + read_dimacs_max_flow(g, capacity, rev, s, t); + + std::vector< default_color_type > color(num_vertices(g)); + std::vector< long > distance(num_vertices(g)); + long flow = boykov_kolmogorov_max_flow(g, s, t); + + std::cout << "c The total flow:" << std::endl; + std::cout << "s " << flow << std::endl << std::endl; + + std::cout << "c flow values:" << std::endl; + graph_traits< Graph >::vertex_iterator u_iter, u_end; + graph_traits< Graph >::out_edge_iterator ei, e_end; + for (boost::tie(u_iter, u_end) = vertices(g); u_iter != u_end; ++u_iter) + for (boost::tie(ei, e_end) = out_edges(*u_iter, g); ei != e_end; ++ei) + if (capacity[*ei] > 0) + std::cout << "f " << *u_iter << " " << target(*ei, g) << " " + << (capacity[*ei] - residual_capacity[*ei]) + << std::endl; + + return EXIT_SUCCESS; +} |