Post Archive - AtCoder

AtCoder Regular Contest++ 220 Announcement

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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">sounansya</a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username">Nyaan</a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/maspy" class="username">maspy</a> - Rated range: 1600 ~ 2999 - Point Values: 600-800-800-800-1000 We are looking forward to your participation!

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AtCoder Beginner Contest 458 Announcement

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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">physics0523</a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username">sheyasutaka</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username">sounansya</a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username">Nyaan</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/KumaTachiRen" class="username">KumaTachiRen</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/harurun4635" class="username">harurun4635</a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-525-625 We are looking forward to your participation!

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AtCoder Heuristic Contest 065 Announcement

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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">wata_admin</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!

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AtCoder Regular Contest-- 219 Announcement

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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">sheyasutaka</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username">sounansya</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/kyopro_friends" class="username">kyopro_friends</a> - Tester: <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username">sheyasutaka</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username">sounansya</a> - Rated range: 800 ~ 2399 - Point Values: 400-400-500-500-600-600-700 We are looking forward to your participation!

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Polaris.AI Programming Contest 2026（AtCoder Beginner Contest 457） Announcement

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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">sounansya</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/harurun4635" class="username">harurun4635</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username">vwxyz</a> - Tester: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username">vwxyz</a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/cn449" class="username">cn449</a> - Rated range: ~ 1999 - The point values: 100-200-300-400-475-525-625 We are looking forward to your participation!

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AtCoder Regular Contest 218 Announcement

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We will hold <a href="https://atcoder.jp/contests/arc218">AtCoder Regular Contest 218</a>. - Contest URL: https://atcoder.jp/contests/arc218 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260503T2100&p1=248 - Duration: 120 minutes - Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/PCTprobability" class="username">PCTprobability</a> - Tester: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username">Nyaan</a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/maspy" class="username">maspy</a> - Rated range: 1200 ~ 2799 - Point Values: 400-400-600-700-800-1000(700+300) We are looking forward to your participation!

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AtCoder Beginner Contest 456 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc456">AtCoder Beginner Contest 456</a>. - Contest URL: https://atcoder.jp/contests/abc456 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260502T2100&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">kyopro_friends</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/KumaTachiRen" class="username">KumaTachiRen</a> - Tester: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/mechanicalpenciI" class="username">mechanicalpenciI</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/sounansya" class="username">sounansya</a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-525-600 We are looking forward to your participation!

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JR WEST and ALGO ARTIS Programming Contest (AtCoder Heuristic Contest 064) Announcement

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We will hold <a href="https://atcoder.jp/contests/ahc064">JR WEST and ALGO ARTIS Programming Contest (AtCoder Heuristic Contest 064)</a>. - Contest URL: https://atcoder.jp/contests/ahc064 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260426T1500&p1=248 - Duration: 4 hours - Writer: <a href="https://atcoder.jp/users/ryomac1?contestType=heuristic" class="username">ryomac1</a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"><a href="https://atcoder.jp/users/Jirotech?contestType=heuristic" class="username">Jirotech</a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"><a href="https://atcoder.jp/users/yochan?contestType=heuristic" class="username">yochan</a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"><a href="https://atcoder.jp/users/yunix?contestType=heuristic" class="username">yunix</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!

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Ｓｋｙ Inc, Programming Contest 2026 (AtCoder Beginner Contest 455) Announcement

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We will hold <a href="https://atcoder.jp/contests/abc455">Ｓｋｙ Inc, Programming Contest 2026 (AtCoder Beginner Contest 455)</a>. - Contest URL: https://atcoder.jp/contests/abc455 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260425T2100&p1=248 - Duration: 100 minutes - Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/cn449" class="username">cn449</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/vwxyz" class="username">vwxyz</a>, <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username">sheyasutaka</a> - Tester: <img src="//img.atcoder.jp/assets/user/user-yellow-4.png" class="user-rating-stage-m"><a href="/users/MMNMM" class="username">MMNMM</a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/physics0523" class="username">physics0523</a> - Rated range: ~ 1999 - The point values: 100-200-300-400-450-525-625 We are looking forward to your participation!

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Keysight Technologies Programming Contest（AtCoder Beginner Contest 454） Announcement

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We will hold <a href="https://atcoder.jp/contests/abc454">Keysight Technologies Programming Contest（AtCoder Beginner Contest 454）</a>. - Contest URL: https://atcoder.jp/contests/abc454 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20260418T2100&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/sounansya" class="username">sounansya</a>, <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/Nyaan" class="username">Nyaan</a> - Tester: <img src="//img.atcoder.jp/assets/user/user-orange-3.png" class="user-rating-stage-m"><a href="/users/sheyasutaka" class="username">sheyasutaka</a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/harurun4635" class="username">harurun4635</a> - Rated range: ~ 1999 - The point values: 100-200-300-425-450-525-625 We are looking forward to your participation!

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