I'm maroonrk. I have been serving as an admin for AtCoder's Algorithm division since 2021, but I would like to announce that I will be stepping down at the end of January 2027. There are several reasons behind this decision, but the biggest turning point was this year's AWTF. It wasn't because I was devastated by seeing humans lose to AI. Having watched AI's progress, I had expected that this day would eventually come. I won't deny that seeing AI solve every problem was a shock, but even so, I am glad that I had the opportunity to witness that historic moment, and that the problems presented on that stage were ones I had created. That contest left me with a certain sense of accomplishment. I felt that all the effort I had poured into organizing contests over the years had been rewarded by becoming a part of history. At the same time, I began to feel that I needed to take on a new challenge. For a while, I wasn't sure what that challenge should be, but I gradually came to the conclusion that it would have to be something other than continuing as an admin. Now, let me turn to the plans for the remaining contests. I had hoped to use all the problems that had been submitted to me, but there simply wasn't enough time left in the year. Some of you may have noticed that the contest scheduled for November 22 was changed from an ARC to an AGC and then back again. This confusion was caused by my attempt to rush through the queue of submitted problems. I sincerely apologize for the confusion this caused. After careful consideration, **we have decided, as a special exception, to extend this year's GP30 race through January 2027 and hold AGCs on January 17 and January 24 as well.** The AGC on January 24 will be the last contest I am involved in as an admin. As for contest operations from February 2027 onward, I expect things to remain largely unchanged. Please wait for a separate announcement from the AtCoder team for further details. To avoid any misunderstanding, I am not leaving the competitive programming community. I intend to continue participating in contests as a competitor, and I may still create problems. For now, my goal is to qualify for the AWTF next season. Finally, I would like to express my sincere gratitude to everyone who has participated in AtCoder contests over the years. Although my role will change, I look forward to continuing to be part of this community, and I hope to see you all around. AtCoder Algorithm Admin maroonrk

We will hold <a href="https://atcoder.jp/contests/agc079">AtCoder Grand Contest 079</a>. This contest counts for GP30 scores. <span style="color: red;">Submitting a recording will be required in order to earn a GP30 score. <a href="https://atcoder.jp/posts/agc_proctoring_en">Click here for details.</a></span> - Contest URL: https://atcoder.jp/contests/agc079 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261108T2100&p1=248 - Duration: 210 minutes - Number of Tasks: 4 - Writer: <a href="/users/maroonrk" class="username"><span style="color:#869120;">maroonrk</span></a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/IH19980412" class="username"><span class="user-red">IH19980412</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/hirayuu_At" class="username"><span class="user-red">hirayuu_At</span></a> - Rated range: 2000 ~ The point values will be 700-1100-1100-1900. We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc483">AtCoder Beginner Contest 483</a>. - Contest URL: https://atcoder.jp/contests/abc483 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261107T2100&p1=248 - Duration: 100 minutes - Writer: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/mechanicalpenciI" class="username"><span class="user-orange">mechanicalpenciI</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username"><span class="user-orange">sounansya</span></a> - Tester: <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/icon/crown_bronze.png"> <a href="/users/cn449" class="username"><span class="user-red">cn449</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-500-575 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc482">AtCoder Beginner Contest 482</a>. - Contest URL: https://atcoder.jp/contests/abc482 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261031T2100&p1=248 - Duration: 100 minutes - Writer: <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/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/KumaTachiRen" class="username"><span class="user-orange">KumaTachiRen</span></a>, <img src="//img.atcoder.jp/assets/user/user-yellow-1.png" class="user-rating-stage-m"><a href="/users/milkcoffee" class="username"><span class="user-yellow">milkcoffee</span></a> - Tester: <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-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username"><span class="user-orange">vwxyz</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-475-525-650 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc074">HACK TO THE FUTURE 2027 (AtCoder Heuristic Contest 074)</a>. - Contest URL: https://atcoder.jp/contests/ahc074 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261030T1900&p1=248 - Duration: 10 days - Division Change Deadline: Within 48 hours after the contest starts. - Writer: <a href="/users/wata_admin" class="username"><span class="user-unrated">wata_admin</span></a> - Rated range: All (Heuristic Rating) This contest is one of the qualifying contests for <a href="https://atcoder.jp/posts/1636">AWTF 2027</a>. <b>This contest will be held in two divisions: the Human only division, where the use of generative AI is prohibited, and the With AI division, where generative AI can be used freely.</b> For details, please see <a href='https://atcoder.jp/posts/long-ahc-divisions-2026_en'>Format of Upcoming Long-Term AtCoder Heuristic Contests (AHC)</a> Whether you're looking to make greater use of generative AI or prefer to tackle challenges without relying on it, we look forward to your participation!

We will hold <a href="https://atcoder.jp/contests/arc233">AtCoder Regular Contest++ 233</a>. - Contest URL: https://atcoder.jp/contests/arc233 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261025T2100&p1=248 - Duration: 150 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> - 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: 1600 ~ 2999 - Point Values: 700-900-900-900 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc481">SMBC Programming Contest #2 (AtCoder Beginner Contest 481）</a>. - Contest URL: https://atcoder.jp/contests/abc481 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261024T2100&p1=248 - Duration: 100 minutes - Writer: <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/icon/crown_bronze.png"> <a href="/users/harurun4635" class="username"><span class="user-red">harurun4635</span></a>, <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> - Tester: <img src="//img.atcoder.jp/assets/user/user-yellow-4.png" class="user-rating-stage-m"><a href="/users/physics0523" class="username"><span class="user-yellow">physics0523</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username"><span class="user-orange">sounansya</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-525-600 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc480">AtCoder Beginner Contest 480</a>. - Contest URL: https://atcoder.jp/contests/abc480 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261017T2100&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/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-yellow-3.png" class="user-rating-stage-m"><a href="/users/MMNMM" class="username"><span class="user-yellow">MMNMM</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/KumaTachiRen" class="username"><span class="user-orange">KumaTachiRen</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-525-600 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc073">AtCoder Heuristic Contest 073</a>. - Contest URL: https://atcoder.jp/contests/ahc073 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261017T1500&p1=248 - Duration: 4 hours - Writer: <a href="/users/wata_admin" class="username"><span class="user-unrated">wata_admin</span></a> - Rated range: All (Heuristic Rating) This contest is one of the qualifying contests for <a href="https://atcoder.jp/posts/1636">AWTF 2027</a>. We are looking forward to your participation!

We will hold the <a href="https://atcoder.jp/contests/ahc_genai_test_2026">AHC GenAI Rules Trial Contest 2026</a> to evaluate proposed generative AI usage rules for future long-term AtCoder Heuristic Contests (AHCs). - Contest Page: https://atcoder.jp/contests/ahc_genai_test_2026 - Start Time: <a href="http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261015T1900&p1=248">http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261015T1900&p1=248</a> - Duration: 3 days - Writer: <a href="/users/wata_admin" class="username"><span class="user-unrated">wata_admin</span></a> - Unrated, no GP30 points Through this trial, we aim to evaluate the clarity and practicality of the rules, as well as their impact on the competitive experience. We encourage you to participate in the contest and would greatly appreciate your feedback through the Registration form!