I’m trying to understand how Yukicoder problem difficulty (1–5 stars) compares to Codeforces ratings. If you have experience with both platforms, I’d really appreciate your thoughts on questions like:
Roughly what CF rating range corresponds to each Yukicoder difficulty?
1★ → CF 800 ~ ?
2★ → CF ? ~ ?
3★ → CF ? ~ ?
4★ → CF ? ~ ?
5★ → CF ? ~ 3500
Do Yukicoder problems feel more implementation-heavy, math-heavy, or trick-based compared to CF?
Any notable differences in difficulty consistency or problem style?
For reference, I’m thinking in terms of CF ratings from ~800 to ~3500. Thanks in advance for sharing your experience!
On yukicoder, there is no admin who ensures problem quality in the way that coordinators do on Codeforces or maroonrk does on AtCoder.
Therefore, the difficulty and nature of problems vary depending on the writer.
There is a rough correspondence between the number of stars and the difficulty, but almost nothing is formally defined.
There is also a website that estimates, for each problem, what AtCoder-level difficulty it would correspond to. If you change the “color by” option to “difficulty,” you can see it.
https://iilj.github.io/yukicoder-problems/#
Thanks! I've got it now.