Find the Cycles


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Both Trees and Graphs consist of Nodes pointing to each other. In fact, a tree is just a type of graph that contains no cycles. A cycle means you can leave a node along one path and return to it on a different path. Given a Graph in the original format, can you determine if there are any cycles in it?

No Cycles in this Graph:

But there are multiple Cycles in this Graph:

Challenge

Print true if the graph has a cycle and false otherwise.

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