DSA Pattern Playbook with Ankur Kesharwani

You have solved 500 problems and still freeze when a new one appears on the shared editor. That is not an effort problem. It is that random practice never built an index you can search under pressure.

This playbook fixes that.

It maps the entire interview surface down to 21 recurring patterns. For each one, you get a three-page spread you can actually work from:

1. The core idea in a single sentence.
2. The exact trigger words in a problem statement that give the pattern away.
3. A clean Java template you can type from memory.
4. A worked dry-run so you see the state change step by step
5. A ladder of hand-picked LeetCode problems, from warm-up to interview-hard.

No filler. No 500-problem grind. Just the shapes that keep coming up, and how to recognise each one in ten seconds.

Who it's for: College students and working engineers preparing for FAANG, product companies, and top startups. Especially service-company engineers making the switch.

What's inside:

1. 21 patterns, two pages each, in build order.
2. A pattern-recognition cheat sheet: what the question says, what to reach for.
3. 250+ curated LeetCode problems with difficulty and a note on what each teaches.
4. Copy-ready Java templates for every pattern
5. A 21-day sprint plan, an interview-day checklist, and a printable progress tracker

Format: 95-page PDF. Instant download.