csacademy's blog

Round #55 (Div. 2) + Rating Change
By csacademy, 7 years ago, In English

Hello, Codeforces!

During the past days at CS Academy, we've been working on tweaking the rating algorithm, and now it's finally here! The total range of the rating has increased, and we also changed the cutoffs for the rating colors and, more important, for the divisions. From now on, you'll be rated in a Div. 2 round if your rating is below 1800.

Round #55

We are also going to host a new contest, Round #55 will take place on Wednesday, November/01/2017 16:05 (UTC). This round will be a Div. 2, affecting users with a rating below 1800.

Contest format:

  • You will have to solve 5 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.

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  • Vote: I like it
  • +56
  • Vote: I do not like it

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7 years ago, # |
  Vote: I like it +12 Vote: I do not like it

I knew something like this was bound to happen since being red was too good to be true. Back to yellow for me!

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7 years ago, # |
  Vote: I like it +63 Vote: I do not like it

"Congratulations! Your rating has increased by 77 points . Keep it up! 2 hours ago"

Thanks, I did nothing today, I will keep it up :)

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    7 years ago, # ^ |
      Vote: I like it +6 Vote: I do not like it

    Same for me but opposite, and I also did nothing today. "Your rating has decreased by 31 points . Better luck next time!"

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7 years ago, # |
← Rev. 2   Vote: I like it +6 Vote: I do not like it

i became blue from red in a month.

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7 years ago, # |
  Vote: I like it +10 Vote: I do not like it

Thanks. Although my rating decreased, I am very happy with the changes since I felt CSA ratings were inflated. Now they seem much more consistent with other platforms like CF.

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7 years ago, # |
  Vote: I like it 0 Vote: I do not like it

I don't mind the rating change, but I think it would be better to have a regular start time contest scheduled in the week of announcement. I want to get back to div1 but the contest starts at 00:05 for me. ;_;

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7 years ago, # |
  Vote: I like it +4 Vote: I do not like it

I was in Div1 for the first time :(

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