Hello, Codeforces!

We are happy to announce that we're going to host a new contest at csacademy.com. Our Beta Round #7 will take place on Sunday, June/12/2016 09:00 (UTC). If you want to take part in this round you need to register before the contest begins. Just like the previous rounds, this will be a Div1 + Div2, with 6 tasks of varied difficulty.

Platform changes since Beta Round #6:

• We added a new comment section/task.
• We added a new editorial section/task.
• We started working on rewriting the editorials and also adding official implementations to the articles.

Contest format:

• You will have to solve 6 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.

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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EDIT: The ratings have been updated and the editorial has been published.