Privacy Policy

• Account registration data (email, username, organization type, locale, etc.)
• Authentication data (password hash, session token hash, API token hash)
• Usage logs (submitted code, evaluation results, IP address, User-Agent, action timestamps)
• Optional feedback submissions

• Operating the Service and authenticating users
• Scoring submissions, ranking, and running contests
• Detecting and responding to abuse and terms violations
• Improving quality, investigating incidents, and statistical analysis
• Sending important notices to users

We retain personal data only for as long as needed to fulfil the purposes above. After account deletion we delete or anonymize the data within a reasonable period, except where law requires longer retention. Submitted code and evaluation logs may be retained longer for contest operation and statistical analysis.

We do not share your personal data with third parties except where required by law or when entrusting data processing (e.g. cloud infrastructure or email delivery) to providers strictly to operate the Service. We require such providers to maintain appropriate safeguards.

We use cookies and similar technologies to keep you signed in, to remember display preferences (theme and locale), and to understand aggregate usage. You can refuse cookies via your browser settings, but some features of the Service may not work as a result.

We use Google Analytics 4, provided by Google LLC, to understand usage and improve the Service. Google Analytics uses cookies to collect anonymous traffic information (pages viewed, time on page, referrer, approximate region, device type, etc.) but does not collect information that directly identifies an individual. Collected data is handled in accordance with Google's privacy policy. To opt out of Google Analytics, install the Google Analytics Opt-out Browser Add-on.

You may request access to, correction of, or deletion of your personal data. For items you cannot edit directly via the profile page, please contact us via the methods below.

For any question about this policy, please reach out via the in-app feedback feature or by email to the operators.