AlgoGraphJava - UCSD Coursera Graph Algorithms done in Java

Age	Commit message (Collapse)	Author
2020-05-20	Check if DAG (Directed Acyclic Graph) done. In the exercise it's Checking ↵	Haidong Ji
	Consistency of CS Curriculum. For the clock variable to assign pre-visit and post-visit values, I used a trick of defining the clock as int[1], so its mutable and I can increment it. I don't know if that's a best practice, but for now I'm happy that the program is good. Fun stuff!