[chiwilliams]

He did use a little autocomplete apparently, but used [Vscode](https://x.com/jacob_posel/status/1945585787690738051).

And it's not against the rules to use LLMs apparently in the competition. (https://atcoder.jp/posts/1495). I'd be curious what other competitors used.

[abound]

Interesting, thanks for the links! I had read this part of the article:

> All competitors, including OpenAI, were limited to identical hardware provided by AtCoder, ensuring a level playing field between human and AI contestants.

And assumed that meant a pretty restricted (and LLM-free) environment. I think their policy is pretty pragmatic.