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Show HN: AlgoDrill – Interactive drills to stop forgetting LeetCode patterns

(algodrill.io)
178 points henwfan | 2 comments | 09 Dec 25 11:09 UTC | HN request time: 0.607s | source

I built AlgoDrill because I kept grinding LeetCode, thinking I knew the pattern, and then completely blanking when I had to implement it from scratch a few weeks later.

AlgoDrill turns NeetCode 150 and more into pattern-based drills: you rebuild the solution line by line with active recall, get first principles editorials that explain why each step exists, and everything is tagged by patterns like sliding window, two pointers, and DP so you can hammer the ones you keep forgetting. The goal is simple: turn familiar patterns into code you can write quickly and confidently in a real interview.

https://algodrill.io

Would love feedback on whether this drill-style approach feels like a real upgrade over just solving problems once, and what’s most confusing or missing when you first land on the site.

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embedding-shape ◴[09 Dec 25 12:20 UTC] No.46204137[source]▶
I learned the other day (https://news.ycombinator.com/item?id=46184676) that people who aren't students apparently use LeetCode too, for recreational purposes? I'm not sure why you'd work on someone else's imaginary problem instead of doing something for yourself, so apparently it's there and some people enjoy it, regardless of my understanding of it.

But then I don't know how to reconcile the idea that some people use LeetCode to pass interviews, some use it recreationally, but then this app seems to indicate some people use LeetCode to learn patterns to implement in the real world, which seems absolutely backwards to me. These are tiny examples, not "real programming" like you'd encounter in the world outside of computers, LeetCode can impossibly teach you how to create useful programs, it only teaches you syntax and specific problems.

So I guess take this as a word of caution, that no matter how much you grind LeetCode, nothing will prepare you to solve real world problems as practicing solving real world problems, and you don't need any platforms for that, just try to make your daily life better and you'll get better at it over time and with experience of making mistakes.

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1. another_twist ◴[09 Dec 25 14:12 UTC] No.46205102[source]▶
I do codeforces in my spare time. Sometimes I implement and ML paper. Other times, I like to slog through my implementation of Raft, Paxos and VR. Not everybody wants to build generic crud app number 1,200,674. Coding is for solving problems, the problems might be engineering or just pure fun.
replies(1): >>46217705 #
2. ATMLOTTOBEER ◴[10 Dec 25 13:51 UTC] No.46217705[source]▶
Idk isn’t copying someone else’s work verbatim boring to you? Usually i try to do at least 15-45minutes of novel research in physics/math with my morning coffee