Aizu Online Judge (AOJ)
online judge aoj · all judges
- site
- https://onlinejudge.u-aizu.ac.jp/
- status
- active
- problem url
https://onlinejudge.u-aizu.ac.jp/problems/{id}- contest url
https://onlinejudge.u-aizu.ac.jp/challenges/sources/ICPC/Regional/{id}- offers
- statements · submissions
- notes
- Hosts every ICPC Asia Japan regional 1998-2024 (one 'challenge day' per year, ids 49-325) plus Japan Domestic qualifiers (ICPC/Prelim, not catalogue) and JAG practice contests (not catalogue). Old judgeapi.u-aizu.ac.jp returns 410 Gone; the live JSON API is https://onlinejudge.u-aizu.ac.jp/api/ (e.g. /api/challenges, /api/challenges/cl/ICPC/Regional, /api/problems?page=0&size=N). 2025 Yokohama regional not yet listed as of 2026-11-03.
- coverage
- 27 contests with a judge page · 264 problems linking here
- data
- judges.yaml