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)

AtCoder Beginner Contest 130 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/abc130">AtCoder Beginner Contest 130</a>. - Contest URL: https://atcoder.jp/contests/abc130 - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20190616T2100&p1=248 - Duration: 100 minutes - Number of Tasks: 6 - Writer: <a href='/users/satashun' class='username'><span class='user-orange'>satashun</span></a>, <a href='/users/DEGwer' class='username'><span class='user-red'>DEGwer</span></a>, <a href='/users/yuma000' class='username'><span class='user-orange'>yuma000</span></a>, <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/gazelle' class='username'><span class='user-orange'>gazelle</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600. We are looking forward to your participation!

diverta 2019 Programming Contest 2 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/diverta2019-2">diverta 2019 Programming Contest 2</a>. - Contest URL: https://atcoder.jp/contests/diverta2019-2 - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=&p1=248 - Duration: 120 minutes - Number of Tasks: 6 - Writer: <a href='/users/satashun' class='username'><span class='user-orange'>satashun</span></a>, <a href='/users/yuma000' class='username'><span class='user-orange'>yuma000</span></a>, <a href='/users/E869120' class='username'><span class='user-red'>E869120</span></a>, <a href='/users/square1001' class='username'><span class='user-orange'>square1001</span></a> - Rated range: ~ 2799 The point values will be announced later. We are looking forward to your participation!

AtCoder Beginner Contest 129 information

posted:
During the first minutes of AtCoder Beginner Contest 129, some of the input files for Problem C on the judge servers were malformed, which caused incorrect verdicts on some submissions. We will take the following measures to deal with this issue. If you think you were affected by this issue, please send the following information from the “Clarification” tab by June 11, 23:59(JST): - The URL of your submission for Problem C which was initially judged as wrong but rejudged as correct - The amount of time you think you wasted because of this issue We will decrease the submission times of your later submissions by at most (21:27:00 JST - the submission time for Problem C). We will temporarily update the participants’ ratings, but we will update them again after these measures have taken. We apologize again for the trouble.

AtCoder Beginner Contest 129 Announcement

posted:
We will hold <a href="https://atcoder.jp/contests/abc129">AtCoder Beginner Contest 129</a>. - Contest URL: https://atcoder.jp/contests/abc129 - Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=&p1=248 - Duration: 100 minutes - Number of Tasks: 6 - Writer: <a href='/users/satashun' class='username'><span class='user-orange'>satashun</span></a>, <a href='/users/yuma000' class='username'><span class='user-orange'>yuma000</span></a>, <a href='/users/tozangezan' class='username'><span class='user-red'>tozangezan</span></a>, <a href='/users/potetisensei' class='username'><span class='user-orange'>potetisensei</span></a>, <a href='/users/sheyasutaka' class='username'><span class='user-orange'>sheyasutaka</span></a> - Rated range: ~ 1999 The point values will be 100-200-300-400-500-600. We are looking forward to your participation!

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.