🧮 Interview Prep
Core Algorithms
Arrays, strings, hash maps, two pointers, sliding windows, stacks, binary search and linked lists: the coding rounds at almost every company.
📘 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.