-is-this-fft-'s blog

Where is the announcement of Round 421?
By -is-this-fft-, history, 7 years ago, In English

I was hoping to see discussion on the problems, but the announcement seems to have disappeared.

EDIT: Back up!

  • Vote: I like it
  • +91
  • Vote: I do not like it

»
7 years ago, # |
  Vote: I like it +1 Vote: I do not like it

Also the ratings are not updated yet :\

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +5 Vote: I do not like it

    Old ratings 2 hours after the contest is not uncommon though.

    → Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +12 Vote: I do not like it

    Hi guys! Something bad happens to cf-predictor, it's falling over and over again. It's not clear what is the reason. You could download prediction here. Mirror will be available soon.

    UPD

    I can see rating prediction on standings page, hope you too:) Website currently deployed on AWS

    → Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I think the round will be unrated due to fault in data set in C div 2.

    → Reply
»
7 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

Seems like the blog author might have deleted it.
It shows no blogs in his profile. http://codeforces.net/blog/adedalic
Edit: The blog is back.

→ Reply
»
7 years ago, # |
  Vote: I like it +23 Vote: I do not like it

Someone found a counter-example for the systests for Div1A/Div2C.

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    How was counter-example? Test were weak or not correct?

    → Reply
    • »
      »
      »
      7 years ago, # ^ |
      ← Rev. 2   Vote: I like it 0 Vote: I do not like it

      Not correct. A complete bruteforce solution found a better answer on some case from the systest. The probable intended solution was a greedy solution with no proof.

      → Reply
      • »
        »
        »
        »
        7 years ago, # ^ |
          Vote: I like it +8 Vote: I do not like it

        In this case I think they should rejudge solutions or make round unrated.

        → Reply
        • »
          »
          »
          »
          »
          7 years ago, # ^ |
            Vote: I like it +3 Vote: I do not like it

          If the problem is only in final tests, rejudging submissions will be enough!

          → Reply
          • »
            »
            »
            »
            »
            »
            7 years ago, # ^ |
            ← Rev. 2   Vote: I like it 0 Vote: I do not like it

            Seems you will get + rating from this round if it will be rated :D

            P.S. Yes, I would prefer to rejudge submissions too

            → Reply
        • »
          »
          »
          »
          »
          7 years ago, # ^ |
            Vote: I like it 0 Vote: I do not like it

          I think rejudge might not help even if pretests were right. Since there is hacking . And someone might be affected by that.

          → Reply
»
7 years ago, # |
  Vote: I like it +16 Vote: I do not like it

We posted about some potential problem for judge data of C with the test case. Then it got deleted. So we think it really does have some problem

→ Reply
»
7 years ago, # |
  Vote: I like it -8 Vote: I do not like it

I hope it will be unrated:D

→ Reply
  • »
    »
    7 years ago, # ^ |
    ← Rev. 2   Vote: I like it 0 Vote: I do not like it

    Then it will be 2 unrated contests in a row for div2 lol

    → Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    it will be the second contest in a row that become unrated in less than a week :D

    → Reply
»
7 years ago, # |
← Rev. 3   Vote: I like it 0 Vote: I do not like it

This happened just because she didn't send nUdes.

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

Now they published again http://codeforces.net/blog/entry/52927

→ Reply
  • »
    »
    7 years ago, # ^ |
      Vote: I like it +2 Vote: I do not like it

    Oh! There is no announcement in recent actions again!

    → Reply
    • »
      »
      »
      7 years ago, # ^ |
      ← Rev. 2   Vote: I like it -8 Vote: I do not like it

      Oh, there is announcement in recent actions again! Revisited! I'm very happy!!!

      Due to downvotes, I wrote the comment in the announcement:

      I'm really disappointed about the blog post rating is negative. Several hour ago, the post rating was 300-400, but now it is -50. I think some people was disappointed about unrated. Me too. But the contest writer worked very much for codeforces and people, and you may enjoyed the other problems. So I think this post should be positive, at least 0 because you may enjoyed at least a little, and the writer worked very much. Don't blame the writer too much.

      But the post rating was increased from -50 to +6! (It tend to positive!!) I'm very happy, which is the opposite of dissappointment.
      In addition, I still pray the post rating will be positive.

      → Reply