> But it's the kind of thing you would see in a CS textbook, not just come up with on your own. Well, LeetCode is a CS-textbook-problems kind of site. You use

> But it's the kind of thing you would see in a CS textbook, not just come up with on your own. Well, LeetCode is a CS-textbook-problems kind of site. You use it however you like. While I was searching for my first job, I spent some time solving problems and optimizing them, half to keep my skills from degrading after college, and half just for fun. I just treated it like a puzzle collection and had a good time with some of the more open-ended questions. I'm sure it'd be useful to help learn a new language as well. I'm not convinced it's effective as a general skill-improvement tool, though.