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Questions about the branch of combinatorics called graph theory (not to be used for questions concerning the graph of a function). This tag can be further specialized via using it in combination with more specialized tags such as extremal-graph-theory, spectral-graph-theory, algebraic-graph-theory, topological-graph-theory, random-graphs, graph-colorings and several others.

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Exact Length Problem in a directed graph

I have a directed graph that consist of N^2 vertices (like a square) and each vertex is connected to at most 1 node (not bidirectional) and every connections have length 1. There are no cycles in the …
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