We will hold <a href="https://atcoder.jp/contests/arc220">AtCoder Regular Contest++ 220</a>. - Contest URL: https://atcoder.jp/contests/arc220 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260517T2100&p1=248 - Duration: 150 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> - 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: 1600 ~ 2999 - Point Values: 600-800-800-800-1000 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc458">AtCoder Beginner Contest 458</a>. - Contest URL: https://atcoder.jp/contests/abc458 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260516T2100&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/physics0523" class="username"><span class="user-orange">physics0523</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-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/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username"><span class="user-red">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-orange-2.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: 100-200-300-400-450-525-625 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/ahc065">AtCoder Heuristic Contest 065</a>. - Contest URL: https://atcoder.jp/contests/ahc065 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260516T1500&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 <a href="https://atcoder.jp/contests/arc219">AtCoder Regular Contest-- 219</a>. - Contest URL: https://atcoder.jp/contests/arc219 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260510T2100&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-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-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-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: 800 ~ 2399 - Point Values: 400-400-500-500-600-600-700 We are looking forward to your participation!

We will hold <a href="https://atcoder.jp/contests/abc457">Polaris.AI Programming Contest 2026（AtCoder Beginner Contest 457）</a>. - Contest URL: https://atcoder.jp/contests/abc457 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260509T2100&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-2.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/vwxyz" class="username"><span class="user-orange">vwxyz</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/icon/crown_bronze.png"> <a href="/users/cn449" class="username"><span class="user-red">cn449</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-475-525-625 We are looking forward to your participation!