@stellasie I'm terribly sorry for not answering before. I try to respond to questions and comments as soon as possible, but I must have missed yours. Please let me know if I still can help you (even if I'm three months late.)

The short answer is that I don't have a preference for how you solve the task. The function should return true if it's possible in any way. In the example you mention, it clearly is possible.

Well, if you don't know which one to choose, why not try both and see if any of them works out. :-)

Let me know if you need more hints.

This was a perfect test case for me to illustrate my problem. Works fine on everything except for that instance. That said, I don't know how to resolve it in either case.

Thanks stella for your feed :)

Can I ask you to be a bit more specific about the parts that you think were not explained in the description, so to see if I should fix it?

public interface Node {
	Node getNext();
}

That allowed me to code offline. Pretty trivial.