Original Post on AtCoder

We have updated the generative‑AI rules in ABC,ARC,and AGC. In addition to this, we explicitly prohibit code obfuscation.

Rules

For the full rules, please see:

• AtCoder Rules against Generative AI — Version 20261014

Changes to the Rules

• If you want to use code created by generative AI during a contest, you should publish the code before the contest begins and include the URL in your submission.
• Code obfuscation is now explicitly prohibited.

For the detailed diff, please see this.