Hello, Codeforces!
We are happy to announce that we're going to host a new contest at csacademy.com. Round #16 will take place on Sunday, 11/Dec/2016 12:00 (UTC). If you want to take part in this round you need to register before the contest begins.
This contest will be a Div1 + Div2, with 7 tasks of varied difficulty that need to be solved in 2 hours. ALL 7 problems will be interactive. Check out our blog post for more details about interactive problems.
Many thanks to Yury_Bandarchuk for translating the problem statements in Russian.
Contest format:
- You will have to solve 7 tasks in 2 hours.
- There will be full feedback throughout the entire contest.
- Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
- Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
- Besides the score, each user will also get a penalty that is going to be used as a tie breaker.
About the penalty system:
- Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
- Solutions that don't compile or don't pass the example test cases are ignored.
- Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.
Platform changes since Round #15
- Added interactive problems
- Added analysis section for contests
We still recommend using an updated version of Google Chrome. If you find any bugs please email us at contact@csacademy.com
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I really can't believe that I'm asking this... is it rated?
Just wondering because this is a new type of problem which might mean it is unrated. I couldn't find anything on this post nor the post on csacademy.com. Thanks!
Yes, the round is rated for all participants.
Let's see if this will remain true after the contest ends ;)
Just a reminder, the round starts in less than 3 hours.
The third task https://csacademy.com/contest/round-16/#task/marble-weights/ is same as this http://mirror.codeforces.com/problemset/problem/727/C !!!
Sorry about this, I didn't know the problem was already on CF.
Technically speaking, our problem was a bit easier, as you could choose a subset of any size >= 2 (the CF version enforces subsets of size = 2).
Rating system doesn't seem to be very fair. LHiC won that contest and got +6 points :d. And current leader of overall standings got +19 in his last contest for placing at 12th place.
Furthermore, my friend who got 0 in the contest (and was 1500, i.e. unrated before) got +9 rating or something like that. Also, I got rank 15 and my friend got rank 80+ but our rating is quite close. (156x vs 1600) The rating system needs a rework IMO.
Yes, you are right. We'll investigate tomorrow and probably recalculate the ratings.