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AtCoder Beginner Contest 381 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc381">AtCoder Beginner Contest 381</a>. - Contest URL: https://atcoder.jp/contests/abc381 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241122T2100&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-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/PCTprobability" class="username"><span class="user-red">PCTprobability</span></a> - Tester: <img src="//img.atcoder.jp/assets/user/user-yellow-4.png" class="user-rating-stage-m"><a href="/users/MtSaka" class="username"><span class="user-yellow">MtSaka</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.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: 150-150-300-425-500-525-675 We are looking forward to your participation!

AtCoder Regular Contest 187 Announcement

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We will hold <a href="https://atcoder.jp/contests/arc187">AtCoder Regular Contest 187</a>. - Contest URL: https://atcoder.jp/contests/arc187 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241117T2100&p1=248 - Duration: 120 minutes - Number of Tasks: 5 - Writer: <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/nok0" class="username"><span class="user-orange">nok0</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 The point values will be 600-600-800-900-1000. Please note that new generative AI rules will be applied for also ARC from this ARC. We are looking forward to your participation!

AtCoder Beginner Contest 380 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc380">AtCoder Beginner Contest 380</a>. - Contest URL: https://atcoder.jp/contests/abc380 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241116T2100&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-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-1.png" class="user-rating-stage-m"><a href="/users/MMNMM" class="username"><span class="user-orange">MMNMM</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/nok0" class="username"><span class="user-orange">nok0</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-350-450-500-575 Please note that new generative AI rules will be applied from this ABC. We are looking forward to your participation!

THIRD PROGRAMMING CONTEST 2024(AtCoder Heuristic Contest 039) Announcement

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We will hold <a href="https://atcoder.jp/contests/ahc039">THIRD PROGRAMMING CONTEST 2024(AtCoder Heuristic Contest 039)</a>. - Contest URL: https://atcoder.jp/contests/ahc039 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241110T1500&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/1164">AWTF 2025</a>. We are looking forward to your participation!

Toyota Programming Contest 2024#11(AtCoder Beginner Contest 379) Announcement

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We will hold <a href="https://atcoder.jp/contests/abc379">Toyota Programming Contest 2024#11(AtCoder Beginner Contest 379)</a>. - Contest URL: https://atcoder.jp/contests/abc379 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241109T2100&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/MtSaka" class="username"><span class="user-orange">MtSaka</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/toam" class="username"><span class="user-orange">toam</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-4.png" class="user-rating-stage-m"><a href="/users/yuto1115" class="username"><span class="user-orange">yuto1115</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/cn449" class="username"><span class="user-orange">cn449</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-400-475-550-575 We are looking forward to your participation!

AtCoder Beginner Contest 378 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc378">AtCoder Beginner Contest 378</a>. - Contest URL: https://atcoder.jp/contests/abc378 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241102T2100&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/sotanishy" class="username"><span class="user-orange">sotanishy</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/nok0" class="username"><span class="user-orange">nok0</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-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-4.png" class="user-rating-stage-m"><a href="/users/mechanicalpenciI" class="username"><span class="user-orange">mechanicalpenciI</span></a> - Rated range: ~ 1999 - The point values: 100-200-300-425-475-500-650 We are looking forward to your participation!

AtCoder Regular Contest 186 Announcement

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We will hold <a href="https://atcoder.jp/contests/arc186">AtCoder Regular Contest 186</a>. - Contest URL: https://atcoder.jp/contests/arc186 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241027T2100&p1=248 - Duration: 120 minutes - Number of Tasks: 5 - Writer: <img src="//img.atcoder.jp/assets/user/user-orange-4.png" class="user-rating-stage-m"><a href="/users/nuip" class="username"><span class="user-orange">nuip</span></a> - Tester: <a href="/users/maroonrk" class="username"><span style="color:#869120;">maroonrk</span></a> - Rated range: 1200 ~ 2799 The point values will be <s>800-900-900-900-1000</s> <font color="red">900-900-900-900-1000</font>. Note: This ARC also serves as a qualification round to select the 18 contestants for the Japanese national finals, making it significantly more difficult than a regular ARC. <s>(For reference, the difficulty is close to that of ARC184.)</s> <font color="red">Due to circumstances, we replaced the tasks and changed the point values. Since there are no easy tasks, the difficulty level of solving one or more tasks has increased. Please be careful. Since the difficulty level is flat, we recommend reading all the tasks and not necessarily solving them in order.</font> We are looking forward to your participation!

TOYOTA SYSTEMS Programming Contest 2024(AtCoder Beginner Contest 377) Announcement

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We will hold <a href="https://atcoder.jp/contests/abc377">TOYOTA SYSTEMS Programming Contest 2024(AtCoder Beginner Contest 377)</a>. - Contest URL: https://atcoder.jp/contests/abc377 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241026T2100&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/MMNMM" class="username"><span class="user-orange">MMNMM</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-1.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-2.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-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: 100-200-300-400-475-550-575 We are looking forward to your participation!

AtCoder Beginner Contest 376 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc376">AtCoder Beginner Contest 376</a>. - Contest URL: https://atcoder.jp/contests/abc376 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20241019T2100&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/yuto1115" class="username"><span class="user-orange">yuto1115</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>, <a href="/users/evima" class="username"><span class="user-unrated">evima</span></a> - Tester: <img src="//img.atcoder.jp/assets/user/user-orange-1.png" class="user-rating-stage-m"><a href="/users/sotanishy" class="username"><span class="user-orange">sotanishy</span></a>, <img src="//img.atcoder.jp/assets/user/user-orange-2.png" class="user-rating-stage-m"><a href="/users/toam" class="username"><span class="user-orange">toam</span></a> - Rated range: ~ 1999 - The point values: 150-250-350-400-475-550-650 We are looking forward to your participation!

Survey on Upcoming Changes to AHC

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From 2025, we plan to make changes to the number of contests and the rating system in the AtCoder Heuristic Contest (AHC). For details about the changes, please refer to the following page and participate in the survey. - Details and Responses: https://atcoder.jp/contests/ahc-survey2024 - Response Period: Until Sunday, October 27, 2024 ### Changes 1. The number of contests will increase. There are two options regarding the number of short and long contests, so please let us know your preference. 2. A time-based decay will be introduced to the rating system. There are two options regarding the timing of the decay, so please let us know your preference.