FeatCode gives you a step-by-step roadmap through data structures & algorithms, plus the Blind 75 problem set — every problem paired with a free video walkthrough.
New here? Take the free DSA assessment to see where you stand, or start the free Python course if you're new to Python.
No fluff — just a proven path and the problems that matter most.
Learn patterns in the right order — from arrays & hashing to dynamic programming — so every new topic builds on the last.
The exact 75 problems that cover the patterns interviewers actually test, grouped by topic and difficulty.
Free — no sign-in. Answer questions across all 18 patterns and get a score, your weak spots, and a study plan. Take the assessment →
New to Python? A 12-lesson crash course plus a cheatsheet, covering exactly what you need for DSA interviews. Start the course →
Every problem links to a free, high-quality video walkthrough so you're never stuck without an explanation.
Check problems off as you solve them. Sign in and your progress follows you across every device.
Filter by pattern or difficulty, or search by name, to focus your practice exactly where you need it.
A clean, fast, responsive site that works just as well on your phone during a commute as it does at your desk.
Not sure where you stand? Take the assessment. New to Python? Start the course. Ready to grind? Jump into the roadmap.