use Map;
/// Different graph traits.
/// Graph data structure with various editing operations.
/// Graph data structure for fast short-distance queries.
/// Data structure for graphs with an ordered vertex set.
/// Data structures for graphs with a fixed vertex ordering which makes
/// stores certain 'reachable' sets for each vertex.
/// Data structure for degenerate graphs.
/// Various iterators for graph traits.
/// Graph algorithms.
/// File I/O.