Contest

Active Contests

Start Time Contest Name
2012/06/25 00:00 practice contest

Upcoming Contests

Start Time Contest Name
2018/09/23 21:00 AtCoder Beginner Contest 110
2018/09/29 21:00 AtCoder Beginner Contest 111
2018/09/29 21:00 AtCoder Regular Contest 103

Recent Contests

Start Time Contest Name
2018/09/15 21:00 AtCoder Grand Contest 027
2018/09/08 21:00 AtCoder Beginner Contest 109
2018/09/01 21:00 AtCoder Regular Contest 102
2018/09/01 21:00 AtCoder Beginner Contest 108
2018/08/25 21:00 AtCoder Regular Contest 101
2018/08/25 21:00 AtCoder Beginner Contest 107
2018/08/18 21:00 AtCoder Beginner Contest 106
2018/08/11 21:00 AtCoder Beginner Contest 105
2018/08/05 21:00 AtCoder Beginner Contest 104
2018/07/21 21:00 AtCoder Beginner Contest 103

view all / Calendar

Ranking

User Rating
1 tourist 4114
2 Um_nik 3827
3 Petr 3752
4 w4yneb0t 3710
5 yutaka1999 3698
6 LHiC 3674
7 cospleermusora 3659
8 apiad 3635
9 ksun48 3610
10 semiexp 3513

view all / Hall of Fame

Information

[How to get an account / participate in contests?](http://atcoder.jp/post/2) [AtCoder's Contest Format](http://atcoder.jp/post/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://docs.google.com/spreadsheets/d/1T-hKu_vIh8l4EiW6XTWOvP0evzsWj0f45JNNgou21Cc/edit#gid=695896678)

Announcement for beta version

We provide [beta version](https://beta.atcoder.jp/). Several functions has been added. Please try it!
last update:

AtCoder Grand Contest 027 Announcement

posted:
[AtCoder Grand Contest 027](https://beta.atcoder.jp/contests/agc027) will be held on Saturday. This contest counts for GP30 scores. - Time: September 15th (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180915T2100&p1=248) - Duration: TBD (around 2 hours) - Number of Tasks: 6 - Writer: <a href='/user/camypaper' class='username'><span style='color:#FF8000;'>camypaper</span></a>, <img src='/public/img/icon/crown3200.gif'> <a href='/user/sugim48' class='username'><span style='color:#C06000;'>sugim48</span></a> - Rated: Yes We are looking forward to your participation! The point values will be announced later.
last update:

AtCoder Beginner Contest 109 announcement

posted:
[AtCoder Beginner Contest 109](https://beta.atcoder.jp/contests/abc109) will be held. - Time： September 8th (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180908T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - Rated range： 0-1199 The point values are: 100 - 200 - 300 - 400 We are looking forward to your participation!
last update:

AtCoder Regular Contest 102 / Beginner Contest 108 Announcement

posted:
Two contests [AtCoder Regular Contest 102](https://beta.atcoder.jp/contests/arc102) and [AtCoder Beginner Contest 108](https://beta.atcoder.jp/contests/abc108) will be held at the same time. You can participate in whichever contest you want. (However, you can't register to both competitions.) The last two tasks in ABC are the same as the first two tasks in ARC. - Time： September 1st (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180901T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - writer：<a href="/user/DEGwer" class="username"><span class="user-red">DEGwer</span></a> - Rating： 0-2799 for ARC, 0-1199 for ABC The point values will be announced later. We are looking forward to your participation!
last update:

AtCoder Regular Contest 101 / Beginner Contest 107 Announcement

posted:
Two contests [AtCoder Regular Contest 101](https://beta.atcoder.jp/contests/arc101) and [AtCoder Beginner Contest 107](https://beta.atcoder.jp/contests/abc107) will be held at the same time. You can participate in whichever contest you want. (However, you can't register to both competitions.) The last two tasks in ABC are the same as the first two tasks in ARC. - Time： August 25th (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180825T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - writer：<a href="/user/sugim48" class="username"><span class="user-red">sugim48</span></a> - Rating： 0-2799 for ARC, 0-1199 for ABC The point values will be announced later. We are looking forward to your participation!
last update:

AtCoder Beginner Contest 106 announcement

posted:
[AtCoder Beginner Contest 106](https://beta.atcoder.jp/contests/abc106) will be held. - Time： August 18th (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180818T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - writer： <a href="/user/E869120" class="username"><span class="user-red">E869120</span></a> <a href="/user/square1001" class="username"><span class="user-orange">square1001</span></a> - Rated range： 0-1199 The point values are: 100 - 200 - 300 - 400 We are looking forward to your participation!
last update: