Trees Cheat Sheet

Trees Definition: A data structure that models a hierarchical collection of nodes via links.

Interview Problems

Why do I see duplicate challenges? You'll see duplicates because a question may fall into different categories. We keep them here because we believe that it is good to sporadically review old problems. They are optional if already completed-- but reviewing them (and more importantly re-doing them with the new knowledge) will ensure that you've internalized the patterns.