Information

[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/arnpe0ef5wds8cv/AAAk_SECQ2Nc6SVGii3rHX6Fa?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)

Maintenance notification

posted:
Dear users, We are going to suspend our service on the following schedule for maintenance. 【Schedule】 - Start time: Wed, June 5, 2019 14:00(UTC) - End time: Thu, June 5, 2019 20:00(UTC) 【Affected Resource】 - [atcoder.jp](https://atcoder.jp) 【Background】 - Thanks to everyone, the number of participants in the contest has doubled in half a year. As a result, the response of the web page is delayed during the contest, causing everyone to feel unpleasant. - In order to solve this, we were doing continuous improvement without stopping the service, but maintenance with shutdown was finally required. We apologize for the inconvenience to our users. Thank you for your understanding.

AtCoder Grand Contest 034 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/agc034">AtCoder Grand Contest 034</a>. This contest counts for GP30 scores. - Contest URL: https://atcoder.jp/contests/agc034 - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20190602T2100&p1=248 - Duration: TBD (around 2 hours) - Number of Tasks: 6 - Writer: <img src='//img.atcoder.jp/assets/icon/crown3200.gif'> <a href='/users/yosupo' class='username'><span style='color:#274A78;'>yosupo</span></a>, <a href='/users/maroonrk' class='username'><span class='user-red'>maroonrk</span></a>, <a href='/users/sigma425' class='username'><span class='user-red'>sigma425</span></a> - Rated range: All The point values will be announced later. We are looking forward to your participation!

M-SOLUTIONS Programming Contest Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/m-solutions2019"> M-SOLUTIONS Programming Contest</a>. - Contest URL: https://atcoder.jp/contests/m-solutions2019 - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20190601T2100&p1=248 - Duration: 120 minutes - Number of Tasks: 6 - writer:<a href='/users/yokozuna57' class='username'><span class='user-red'>yokozuna57</span></a> - Rated range: ~ 2799 The point values will be announced later. We are looking forward to your participation!

AtCoder Beginner Contest 128 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/abc128">AtCoder Beginner Contest 128</a>. - Time (YY-MM-DD): <a href='http://www.timeanddate.com/worldclock/fixedtime.html?iso=20190526T2100&p1=248' target='blank'><time class='fixtime fixtime-full'>2019-05-26 21:00:00+0900</time></a> (local time) - Duration: 100 minutes - Number of Tasks: 6 - writer:<a href='/users/gazelle' class='username'><span class='user-orange'>gazelle</span></a>, <a href='/users/tozangezan' class='username'><span class='user-red'>tozangezan</span></a>, <a href='/users/satashun' class='username'><span class='user-orange'>satashun</span></a>, <a href='/users/drafear' class='username'><span class='user-orange'>drafear</span></a>, <a href='/users/potetisensei' class='username'><span class='user-orange'>potetisensei</span></a>, <a href='/users/yuma000' class='username'><span class='user-orange'>yuma000</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600 We are looking forward to your participation!

AtCoder Beginner Contest 127 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/abc127">AtCoder Beginner Contest 127</a>. - Time (YY-MM-DD): <a href='http://www.timeanddate.com/worldclock/fixedtime.html?iso=20190525T2100&p1=248' target='blank'><time class='fixtime fixtime-full'>2019-05-25 21:00:00+0900</time></a> (local time) - Duration: 100 minutes - Number of Tasks: 6 - writer:<a href='/users/tozangezan' class='username'><span class='user-red'>tozangezan</span></a>, <a href='/users/drafear' class='username'><span class='user-orange'>drafear</span></a>, <a href='/users/satashun' class='username'><span class='user-orange'>satashun</span></a>, <a href='/users/potetisensei' class='username'><span class='user-orange'>potetisensei</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600 We are looking forward to your participation!