🌳 Interview Prep
Trees, Graphs & DP
Trees, heaps, tries, graphs, backtracking and dynamic programming: what separates a pass from a strong pass at big tech.
📘 Learn it from scratch
Visual, hands-on lessons for every pattern in this topic. Do the lesson, then come back and the questions click.
100 questions, most asked first
Ordered so the most useful questions for learning each pattern come first.