max/edmonds-matching-algorithm
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ensure all outer vertices are scanned

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This commit is contained in:
Maximilian Keßler 2023-11-05 13:06:50 +01:00
parent 14474189c4
commit 1b9f930adf
Signed by: max
GPG key ID: BCC5A619923C0BA5
1 changed files with 89 additions and 77 deletions
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18
src/edmonds.cpp
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@ -30,11 +30,23 @@ std::vector<NodeId> path_to_forest_root(Graph const & graph, NodeId id)
return retval; return retval;
} }
NodeId find_outer_vertex(Graph const & graph)
{
for(NodeId id = 0; id < graph.num_nodes(); ++id)
{
if (not graph.node(id).scanned and graph.is_outer(id))
{
return id;
}
}
return invalid_node_id;
}
Graph maximum_matching_from_initial_matching(Graph & graph) Graph maximum_matching_from_initial_matching(Graph & graph)
{ {
graph.reset_forest(); graph.reset_forest();
for(NodeId id = 0; id < graph.num_nodes(); ++id) { NodeId id;
if (graph.is_outer(id)) while((id = find_outer_vertex(graph)) != invalid_node_id)
{ {
for(NodeId neighbor_id : graph.node(id).neighbors()) for(NodeId neighbor_id : graph.node(id).neighbors())
{ {
@ -124,7 +136,7 @@ Graph maximum_matching_from_initial_matching(Graph & graph)
} }
} }
} }
} graph.node(id).scanned = true;
} }
return graph; return graph;
}; };