i had this weird problem with leetcode. my solve count kept going up. 100 → 200 → 300 → 400+ and somehow i still couldn't answer a pretty basic question: “what are you actually bad at?” someone asked me that after i'd already solved 400+ problems and i just sat there lol. i knew my rating. i knew my streak. i knew which sheets i'd finished. i just didn't know what i actually knew. that question kinda stayed in my head, so i started building GrindLens. it looks at your actual solving history and tries to make sense of it at the pattern level. what you've covered, what you keep struggling with, what you've barely touched, and eventually what you should probably solve next. i've been using it on my own profile for the last few weeks and have been changing things based on what people actually use / complain about. if you grind leetcode, i'd be curious what your answer to that question is: what are you actually bad at?

GrindLens

You solved it. But did you actually learn the pattern?

You solved it. But did you actually learn the pattern?