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!

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!

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!

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!

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!

AtCoder Beginner Contest 105 announcement

posted:
[AtCoder Beginner Contest 105](https://beta.atcoder.jp/contests/abc105) will be held. - Time: August 11th (Saturday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20180811T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - writer:<a href="/user/DEGwer" class="username"><span class="user-red">DEGwer</span></a> <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!