Contest
Permanent Contests
First-time users: practice contest / Library testing: AtCoder Library Practice Contest
Upcoming Contests
Recent Contests
Daily Contests
| Start Time | Contest Name |
|---|---|
| ◉ AtCoder Weekday Contest 0136 Beta |
Ranking: Algorithm
| User | Rating | |
|---|---|---|
| 1 | 3797 | |
| 2 | 3670 | |
| 3 | 3659 | |
| 4 | 3629 | |
| 5 | 3619 | |
| 6 | 3607 | |
| 7 | 3381 | |
| 8 | 3373 | |
| 9 | 3371 | |
| 10 | 3370 |
<a href="https://youtube.com/live/6kyPalDSI4c"><img src="https://img.atcoder.jp/carousel/awtf2026algo-english.png" class="img-responsive center-block" style="max-width: 100%"></a>
<a href="https://youtube.com/live/R9DAkDF5gIs"><img src="https://img.atcoder.jp/carousel/awtf2026heuristic-english.png" class="img-responsive center-block" style="max-width: 100%"></a>
| Category | Start Time | Next Contest |
|---|---|---|
| ABC |
◉ AtCoder Beginner Contest 471 |
|
| ARC |
◉ AtCoder Regular Contest 227 |
|
| AGC | TBD | |
| AHC |
◉ 13th Asprova Programming Contest（AtCoder Heuristic Contest 070） |
|
| AWC |
◉ AtCoder Weekday Contest 0136 Beta |
|
Important announcements
- [2026-08-14] New AtCoder Datasets: First-Party Data for AI Training & Evaluation — Waitlist Open
- [2026-07-30] Survey on Participation Divisions for Long-Term AHCs
- [2026-06-24] Planned Changes to the Generative AI Rules for AHC
- [2026-06-29] Notice Regarding the Sale of AtCoder User Submissions to AI Companies and Updates to the Terms of Service and Privacy Policy
- [2026-06-16] Language Update: C++23 (GCC 15.2.0)
- [2026-03-18] AGC Proctoring Rules
- [2026-02-20] Changes to ARC in 2026
- [2026-01-09] Announcement of AtCoder World Tour Finals 2027
- [2025-10-31] Launch of the New Judge System
- [2025-10-03] Regarding Rule Changes in ABC, ARC and AGC Due to Technological Advancement of Generative AI
- [2025-06-16] Introduction of Generative AI Rules in AHC
- [2025-03-19] Changes to the Rated Cap of ARC Div.1
- [2024-12-27] AHC's New Rating System
- [2016-07-20] Information
- [2024-12-04] Password Management for Your AtCoder Account
- [2024-12-02] Announcement Regarding ARC's Division System
- [2024-07-29] Restructuring of contests
Recent announcements
- [2026-08-14] New AtCoder Regular Contest 227 Announcement
- [2026-08-14] New AtCoder Beginner Contest 471 Announcement
- [2026-08-08] New UNIQUE VISION Programming Contest 2026 Summer (AtCoder Regular Contest 226) Announcement
- [2026-08-07] JPRS Programming Contest 2026#2 (AtCoder Beginner Contest 470) Announcement
- [2026-07-31] AtCoder Beginner Contest 469 Announcement
We will hold <a href="https://atcoder.jp/contests/arc227">AtCoder Regular Contest 227</a>.
- Contest URL: https://atcoder.jp/contests/arc227
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260816T2100&p1=248
- Duration: 120 minutes
- Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/yosupo" class="username"><span class="user-red">yosupo</span></a>
- Tester: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/Nyaan" class="username"><span class="user-orange">Nyaan</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/sigma425" class="username"><span class="user-red">sigma425</span></a>
- Rated range: 1200 ~ 2799
- Point Values: 400-500-700-700-700-800
We are looking forward to your participation!
We will hold <a href="https://atcoder.jp/contests/abc471">AtCoder Beginner Contest 471</a>.
- Contest URL: https://atcoder.jp/contests/abc471
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260815T2100&p1=248
- Duration: 100 minutes
- Writer: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/kyopro_friends" class="username"><span class="user-orange">kyopro_friends</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username"><span class="user-orange">sheyasutaka</span></a>
- Tester: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username"><span class="user-orange">vwxyz</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/physics0523" class="username"><span class="user-orange">physics0523</span></a>
- Rated range: ~ 1999
- The point values: 100-200-300-400-450-550-600
We are looking forward to your participation!
We will hold <a href="https://atcoder.jp/contests/arc226">UNIQUE VISION Programming Contest 2026 Summer (AtCoder Regular Contest 226)</a>.
- Contest URL: https://atcoder.jp/contests/arc226
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260809T2100&p1=248
- Duration: 120 minutes
- Writer: <img src="//img.atcoder.jp/assets/icon/crown_silver.png"> <a href="/users/snuke" class="username"><span style="color:#1000AC;">snuke</span></a>
- Tester: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/Nyaan" class="username"><span class="user-orange">Nyaan</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/maspy" class="username"><span class="user-red">maspy</span></a>
- Rated range: 1200 ~ 2799
- Point Values: 400-500-700-800-1000
We are looking forward to your participation!
We will hold <a href="https://atcoder.jp/contests/abc470">JPRS Programming Contest 2026#2 (AtCoder Beginner Contest 470)</a>.
- Contest URL: https://atcoder.jp/contests/abc470
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260808T2100&p1=248
- Duration: 100 minutes
- Writer： <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username"><span class="user-orange">sounansya</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username"><span class="user-orange">sheyasutaka</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/kyopro_friends" class="username"><span class="user-orange">kyopro_friends</span></a>
- Tester： <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username"><span class="user-orange">vwxyz</span></a></a>
- Rated range: ~ 1999
- The point values: 100-200-300-400-450-500-600
We are looking forward to your participation!
We will hold <a href="https://atcoder.jp/contests/abc469">AtCoder Beginner Contest 469</a>.
- Contest URL: https://atcoder.jp/contests/abc469
- Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260801T2100&p1=248
- Duration: 100 minutes
- Writer: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username"><span class="user-orange">vwxyz</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/cn449" class="username"><span class="user-red">cn449</span></a>
- Tester: <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username"><span class="user-orange">sounansya</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username"><span class="user-orange">sheyasutaka</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/harurun4635" class="username"><span class="user-orange">harurun4635</span></a>
- Rated range: ~ 1999
- The point values: 100-200-300-400-475-500-575
We are looking forward to your participation!