We will hold <a href="https://atcoder.jp/contests/arc225">AtCoder Regular Contest 225</a>. - Contest URL: https://atcoder.jp/contests/arc225 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260719T2100&p1=248 - Duration: 120 minutes - Writer: <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-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: 500-600-600-600-900 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc467">AtCoder Beginner Contest 467</a>. - Contest URL: https://atcoder.jp/contests/abc467 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260718T2100&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-4.png" class="user-rating-stage-m"><a href="/users/Nyaan" class="username"><span class="user-orange">Nyaan</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/user/user-orange-2.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: 100-200-300-425-450-525-625 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc068">estie Programming Contest 2026 (AtCoder Heuristic Contest 068)</a>. - Contest URL: https://atcoder.jp/contests/ahc068 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260718T1500&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>. <b> This will be the final short contest to which the current generative AI rules apply. Starting with the next short contest, the new generative AI rules will take effect. We have also posted important information regarding the use of generative AI on the top page and at the end of the problem statement. Please make sure to read it. </b> We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/arc224">AtCoder Regular Contest-- 224</a>. - Contest URL: https://atcoder.jp/contests/arc224 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260712T2100&p1=248 - Duration: 120 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/user/user-yellow-2.png" class="user-rating-stage-m"><a href="/users/ynymxiaolongbao" class="username"><span class="user-yellow">ynymxiaolongbao</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> - 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/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: 800 ~ 2399 - Point Values: 300-400-500-500-500-700 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc466">AtCoder Beginner Contest 466</a>. - Contest URL: https://atcoder.jp/contests/abc466 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260711T2100&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/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-2.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-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/harurun4635" class="username"><span class="user-orange">harurun4635</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> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-500-600 We are looking forward to your participation!

We will hold AtCoder World Tour Finals 2026 Algorithm. - Contest URL: https://atcoder.jp/contests/awtf2026algo - Mirror Contest URL: https://atcoder.jp/contests/awtf2026algo-open - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20260709T1100&p1=248 - Duration: 420 minutes - Number of Tasks: 5 - Writer: <a href="/user/maroonrk" class="username"><span style="color:#869120;">maroonrk</span></a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_silver.png"> <a href="/user/hos_lyric" class="username"><span style="color:#CAD8F5;">hos_lyric</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"> <a href="/user/tatyam" class="username"><span class="user-red">tatyam</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/user/maspy" class="username"><span class="user-red">maspy</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/user/yosupo" class="username"><span class="user-red">yosupo</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/user/sigma425" class="username"><span class="user-red">sigma425</span></a> - Rated range: Unrated The point values will be 900-900-1500-2500-2500. We don't freeze the standings in the contest. AtCoder World Tour Finals 2026 is an international onsite contest. We have invited top-runners of AtCoder Race Ranking 2025 to Tokyo. This year, as an exhibition match, an AI agent from OpenAI will also participate in the contest. On the contest day, we will stream the contest on our YouTube channel. For more details, please visit this page (https://info.atcoder.jp/more/contents/awtf/2026). The mirror contest is Unrated and the standings is hidden. Other rules are the same as AGC.

We will hold <a href="https://atcoder.jp/contests/abc465">AtCoder Beginner Contest 465</a>. - Contest URL: https://atcoder.jp/contests/abc465 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260704T2100&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/user/user-orange-2.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-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> - 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/arc223">AtCoder Regular Contest 223</a>. - Contest URL: https://atcoder.jp/contests/arc223 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260628T2100&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/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: 1200 ~ 2799 - Point Values: 400-500-500-600-700-800 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc464">Japanese Student Championship 2026 -Advance- Qualification (AtCoder Beginner Contest 464)</a>. - Contest URL: https://atcoder.jp/contests/abc464 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260627T2100&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/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/physics0523" class="username"><span class="user-orange">physics0523</span></a>, <a href="/users/evima" class="username"><span class="user-unrated">evima</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/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: 100-200-300-400-450-550-625 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc067">AtCoder Heuristic Contest 067</a>. - Contest URL: https://atcoder.jp/contests/ahc067 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260621T1900&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!