Every problem is in the order you should solve it: a short lesson, an easy warm-up, the core mediums, then an optional stretch. Solved problems come back for spaced review, and the path ends with timed mock interviews. Tell us your interview date and we plan each day for you.
Set it once. The path and your reviews decide what's next.
Top to bottom, each tier builds on the ones above. Hover a topic to trace its chain; click a topic or pattern to open it.