A recruiter called me and set up a phone screening for a date of my choice.

They were very flexible on the date and definitely want to give you as much time as you want or need to prepare.

They make it clear that they are looking for in-depth knowledge of algorithms, algorithmic analysis, and data structures.

The interview consisted of me answering a couple of questions over the phone and then writing code in a Google Document.

Given a graph node, write code to return a copy of the sub-graph starting with that node.