Question: Deciding whether the input graph is a tree. Present the log-space algorithm. Guideline : Use the fact that a graph a graph G= (V,E) is

Deciding whether the input graph is a tree. Present the log-space algorithm.

Guideline : Use the fact that a graph a graph G= (V,E) is a tree if and only if it is ascyclic and |E|= |V|-1

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