Below you can find a scanned copy of how one interview candidate’s drawing could look like for this particular problem. There is no one recommended way to do it - this is just one possible illustration. We think it may be helpful to have a simple visual representation of how some of the discussed above could be drawn within a few minutes on a plain sheet of paper. Feel free and even encouraged to come up with your own diagrams for this problem.

We used favorites instead of likes, which was the term back then.