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[How to get an account / participate in contests?](http://atcoder.jp/posts/2) [AtCoder's Contest Format](http://atcoder.jp/posts/1) [AtCoder's Testcases](https://www.dropbox.com/sh/nx3tnilzqz7df8a/AAAYlTq2tiEHl5hsESw6-yfLa?dl=0) - [AtCoder's Rating System](https://www.dropbox.com/sh/zpgcogxmmu84rr8/AADcw6o7M9tJFDgtpqEQQ46Ua?dl=0) - [AtCoder Race Ranking](https://img.atcoder.jp/file/GP30.html)

AtCoder Grand Contest 052 Announcement

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We will hold <a href="https://atcoder.jp/contests/agc052">AtCoder Grand Contest 052</a>. This contest counts for GP30 scores. - Contest URL: https://atcoder.jp/contests/agc052 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20210307T2100&p1=248 - Duration: 160 minutes - Number of Tasks: 6 - Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/antontrygubO_o" class="username"><span class="user-red">antontrygubO_o</span></a> - Rated range: 1200 ~ The point values will be 400-800-1000-1000-1500-2000. We are looking forward to your participation!

AtCoder Heuristic Contest 001 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/ahc001">AtCoder Heuristic Contest 001</a>. - Contest URL: https://atcoder.jp/contests/ahc001 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20210306T1200&p1=248 - Duration: 8days+8hours - Number of Tasks: 1 - Writer: <a href="/users/wata" class="username"><span class="user-yellow">wata</span></a> ### About AtCoder Heuristic Contest(AHC) - This is a new series of programming contests that will be held regularly on AtCoder. Unlike algorithm contests such as ABC/ARC/AGC, the goal is to create a better solution to a problem for which it is difficult to find the optimal solution. For examples of problems, see past contests of similar format. - AHC will have a new rating system that is different from the existing ABC/ARC/AGC rating system. Unlike the ABC/ARC/AGC ratings, AHC will use a rating system that does not decrease even if contest performance is poor. Please feel free to participate. - We are planning to hold a long-term contest with a duration of more than a week and a short-term contest with a duration of less than a day, alternately about once a month. We plan to use the same ratings for both the long and short contests, but we may need to use different ratings, or correct the rating formula, due to the possibility of a large bias in the number of participants. For this reason, the ratings will remain in beta for a while. Contest results during the beta period will be used in the official rating. However, due to changes in the rating formula, the rating may change when the official version is released.

AtCoder Beginner Contest 194 Announcement

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We will hold <a href="https://atcoder.jp/contests/abc194">AtCoder Beginner Contest 194</a>. - Contest URL: https://atcoder.jp/contests/abc194 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20210306T2100&p1=248 - Duration: 100 minutes - Number of Tasks: 6 - Writer: <a href="/users/Kmcode" class="username"><span class="user-orange">Kmcode</span></a>, <a href="/users/sheyasutaka" class="username"><span class="user-orange">sheyasutaka</span></a>, <a href="/users/ynymxiaolongbao" class="username"><span class="user-orange">ynymxiaolongbao</span></a>, <a href="/users/QCFium" class="username"><span class="user-red">QCFium</span></a>, <a href="/users/kyopro_friends" class="username"><span class="user-orange">kyopro_friends</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600. We are looking forward to your participation!

Caddi Programming Contest 2021(AtCoder Beginner Contest 193) Announcement

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We will hold <a href="https://atcoder.jp/contests/abc193">Caddi Programming Contest 2021(AtCoder Beginner Contest 193)</a>. - Contest URL: https://atcoder.jp/contests/abc193 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20210227T2100&p1=248 - Duration: 100 minutes - Number of Tasks: 6 - Writer: <a href="/users/evima" class="username"><span class="user-unrated">evima</span></a>, <a href="/users/kyopro_friends" class="username"><span class="user-orange">kyopro_friends</span></a>, <a href="/users/QCFium" class="username"><span class="user-red">QCFium</span></a>, <a href="/users/tatyam" class="username"><span class="user-red">tatyam</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600. We are looking forward to your participation!

AtCoder Regular Contest 113 Announcement

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We will hold <a href="https://atcoder.jp/contests/arc113">AtCoder Regular Contest 113</a>. - Contest URL: https://atcoder.jp/contests/arc113 - Start Time: http://www.timeanddate.com/worldclock/fixedtime.html?iso=20210221T2100&p1=248 - Duration: 120 minutes - Number of Tasks: 6 - Writer: <img src="//img.atcoder.jp/assets/icon/crown_bronze.png"> <a href="/users/DEGwer" class="username"><span class="user-red">DEGwer</span></a>, <img src="//img.atcoder.jp/assets/icon/crown_silver.png"> <a href="/users/maroonrk" class="username"><span style="color:#869120;">maroonrk</span></a> - Rated range: ~ 2799 The point values will be 300-400-500-600-800-1000. We are looking forward to your participation!

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