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Eulerian Graph and Eulerian Trails → Read more...
This article discusses Eulerian circuits and trails in graphs. An Eulerian circuit is a closed trail that contains every edge of a graph, and an Eulerian trail is an open trail that contains all the edges of a graph but doesn’t end in the same start vertex.
This article also explains the Königsberg Bridge Problem and how it’s impossible to find a trail on it. Finally there are two implementations in C++ to find Eulerian trails in directed and underected graphs.