We will hold <a href="https://atcoder.jp/contests/arc231">AtCoder Regular Contest 231</a>. - Contest URL: https://atcoder.jp/contests/arc231 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261004T2100&p1=248 - Duration: 120 minutes - Writer: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/Mitsubachi" class="username"><span class="user-orange">Mitsubachi</span></a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username"><span class="user-red">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: 500-500-600-700-800-800 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc478">AtCoder Beginner Contest 478</a>. - Contest URL: https://atcoder.jp/contests/abc478 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20261003T2100&p1=248 - Duration: 100 minutes - Writer: <img src="//img.atcoder.jp/assets/user/user-yellow-4.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>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/toam" class="username"><span class="user-red">toam</span></a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/harurun4635" class="username"><span class="user-orange">harurun4635</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> - Rated range: ~ 1999 - The point values: 100-200-300-400-475-525-625 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/agc078">AtCoder Grand Contest 078</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/agc078 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260927T2100&p1=248 - Duration: 210 minutes - Number of Tasks: 3 - 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/icon/crown_bronze.png"> <a href="/users/maspy" class="username"><span class="user-red">maspy</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: 2800 ~ The point values will be 1500-1500-1500. The problems in this contest are exceptionally difficult, so as a special exception, we set the lower bound for rated participation to 2800. We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc477">UNICORNProgramming Contest2026(AtCoder Beginner Contest 477)</a>. - Contest URL: https://atcoder.jp/contests/abc477 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260926T2100&p1=248 - Duration: 100 minutes - Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username"><span class="user-red">Nyaan</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/harurun4635" class="username"><span class="user-orange">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/icon/crown_bronze.png"> <a href="/users/cn449" class="username"><span class="user-red">cn449</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.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: 100-200-300-400-450-525-625 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc072">ALGO ARTIS Programming Contest 2026 September（AtCoder Heuristic Contest 072）</a>. - Contest URL: https://atcoder.jp/contests/ahc072 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260925T1900&p1=248 - Duration: 10 days - 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!