Two contests [AtCoder Regular Contest 066](https://arc066.contest.atcoder.jp/) and [AtCoder Beginner Contest 050](https://abc050.contest.atcoder.jp/) 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： December 18th (Sunday), [21:00 JST](http://www.timeanddate.com/worldclock/fixedtime.html?iso=20161218T2100&p1=248) - Duration: 100 minutes - Number of Tasks: 4 - writer：<a href="/user/maroonrk" class="username"><span class="user-orange">maroonrk</span></a> - Rating： 0-2799 for ARC, 0-1199 for ABC The point values are: ARC: 300 - 600 - 900 - 1400 ABC: 100 - 200 - 300 - 600 We are looking forward to your participation!