Question: 4.2.20 Directed Eulerian cycle. An Eulerian cycle is a directed cycle that contains each edge exactly once. Write a graph client Euler that finds an

4.2.20 Directed Eulerian cycle. An Eulerian cycle is a directed cycle that contains each edge exactly once. Write a graph client Euler that finds an Eulerian cycle or reports that no such tour exists. Hint : Prove that a digraph G has a directed Eulerian cycle if and only if G is connected and each vertex has its indegree equal to its outdegree. (Java solution)

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