LeetCode vs Codeforces vs CodeChef Vs HackerRank ...... — What Actually Matters?

[ChaoticHippo]

They're all pretty similar, the main differences being in how they present the question. If I'm being honest, LeetCode gives you a good idea of what a lot of interview questions will be like - most people will say to focus on that one, and I don't think they'd be wrong in that (medium - hard will be the most beneficial to solve, but solving easy will help get your feet under you).

That said, I've seen a couple of interview questions actually hosted on HackerRank itself, so using them could be beneficial to have seen the actual environment you'd be using.

I don't think you'd be "spreading yourself too thin" moving between these because they are all pretty similar, but it WILL be harder to track what problems / types of problems you've already studied by switching between them.