riadwaw's blog

Codeforces Round #120 (Div. 2)
By riadwaw, 12 years ago, translation, In English

Kostroma and I are problemsetters of Codeforces Round #120. It's first our contest and we hope you (and we too) will like it.

It's round for second division, but we think that everyone will find interesting problem for him.

Thanks for the help STAJIKER, HeroShadow, victor_kamashev, Abra, ifsmirnov, Aksenov239 and Gerald.
Thanks MikeMirzayanov for CodeForces platform and Delinur for English statements.

Good luck!

UPD: As usual, problems will cost 500-1000-1500-2000-2500 points.
UPD2: Problems are sorted according to expected difficulty.
UPD3: There was our mistake. The editorial was available for few minutes. If you see it, please not discuss problems and solutions. Now it is hided. In any case the round will be held. Decision, will contest rated or not will be made after contest. We are sorry for that.
UPD4: It's now known that only three participants from Div.2 have seen page with editorial while it was published (and 8 people in total). We'll not say any names, but we ask this people to not say anybody anything about the problem and to not use any post materials, if you have them. Thanks in advance.
UPD5: Please, don't panic. While your solution is in queue, you may solve other problems.
UPD6: Due to technical issues round is considered unrated. This problem and incident with editorial are strong enough reason for this decision. You may send your solutions to contest. They will be judged. We hope, that these technical problems will not spoil your impression about this round. Our sincere apologies. UPD7: Contest is over. Editorial is published. We hope, you like problems, prepared by us. We apologize again.
P.S: Excuse me, I don't know, when solution will be judged.

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

Comments Comments (87)
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12 years ago, # |
← Rev. 4   Vote: I like it 0 Vote: I do not like it

My usual question is: Is dynamic max. score used?

Also someone can be interested if problems are sorted according to expected difficulty.

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

"As usual, problems will cost 500-1000-1500-2000-250 points." I think it should be 2500 points, not 250 points. Lol. :)

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

Gym have a contest. Anyone can participate.

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12 years ago, # |
  Vote: I like it -27 Vote: I do not like it

I hope that it will be very good and eazy ))) contest..

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12 years ago, # |
  Vote: I like it +3 Vote: I do not like it

It seems that the editorial was revealed for a while (now it disappeared). Was that a bug from the website?

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    12 years ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    Probably author mispushed Save instead of Save Draft.

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    12 years ago, # ^ |
      Vote: I like it +8 Vote: I do not like it

    It was mistake by authors.

    I wonder how many people managed to see the editorial. It will be very bad if contest will become unrated before the start.

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

    Fortunately, I didn't see any things.

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    12 years ago, # ^ |
      Vote: I like it +15 Vote: I do not like it

    The contest should be rated, if someone after watching the editorials decides to cheat, perhaps in this contest that persons gains some points but in the next contest they will return to where they belong. Please keep it rated.

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12 years ago, # |
  Vote: I like it +3 Vote: I do not like it

and you guys want us to compete in a contest we don’t know whether it’s rated or not?

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    12 years ago, # ^ |
      Vote: I like it +16 Vote: I do not like it

    Rate or not doesn't matter to me. I will compete and enjoy the contest anyways!

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      12 years ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      contests are rated .. if they are not .. it’s called practice .. u can practice anytime .. not necessarily during this 2 hours !

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        12 years ago, # ^ |
          Vote: I like it -10 Vote: I do not like it

        contests can be rated or not. the decision will be made by the admins. which part of it you don't understand?

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          12 years ago, # ^ |
            Vote: I like it +1 Vote: I do not like it

          which part of "contest" you didn't understand?

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

            I understand, it's bad not to rate a contest. But it also means contest can be rated or not.

            BTW, ALL contests are just practice to me. You and I have different dictionary.

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      12 years ago, # ^ |
        Vote: I like it +3 Vote: I do not like it

      enjoy the contest :D

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12 years ago, # |
  Vote: I like it -18 Vote: I do not like it

all the best everyone for the contest...

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

Judgement Failed

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

Why Judgement Failed?

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

I am getting "Judgement failed" when i try to submit a problem, what does that mean?

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

Judgement Failed what it means? Что ето значит?

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

Judgement Failed...?

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

What is "Judgement Failed?" I am not even able to resubmit. No one answers when I asked from the dashboard.

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

Judgement Failed too

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12 years ago, # |
  Vote: I like it +2 Vote: I do not like it

I think this round should be unrated, because this "Judgement Failed" cost a lot of time.

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

judgment failed

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12 years ago, # |
  Vote: I like it -6 Vote: I do not like it

Is there any reason to rate this contest after all these editorial leaking,judgement failure and than site down?

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

In queue

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

Please add a time...

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

    If this round is unrated, you can try this problem on practice mode in unlimited time

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      12 years ago, # ^ |
        Vote: I like it +14 Vote: I do not like it

      Due to current situation, round can't be rated.

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

This round is like Topcoder SRM, you submit solution, and you must wait 'till the end to know the result. Solution submitted will be "In queue" 'till the end of the contest :d, but you can't hack other, thought. Just kidding!

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    12 years ago, # ^ |
    ← Rev. 2   Vote: I like it +1 Vote: I do not like it

    While waiting, you can submit as many submission and watch the ball bouncing together

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      12 years ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      watch the ball bouncing together...haha

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

hey admins pls. say what happens...

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

What's going on?

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12 years ago, # |
  Vote: I like it +11 Vote: I do not like it

It's the worst contest ever nevertheless the problems themselves are great.

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

    I think it's fortunate that I am competing as out-of-competition; if otherwise, I'd be quite nervous whether it'd be rated/unrated among other things...

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

It is their first contest so problems are hard to prevent. However, great problems. Don't be upset about your unsuccessful start. You can do better next time.

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12 years ago, # |
  Vote: I like it +11 Vote: I do not like it

No offence ...but maybe the team is missing the expertise of Mike Mirzayanov who is gone for ICPC I suppose...

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    12 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    I am going to guess that it's not only him; I think most people's focus is on ACM-ICPC WF right now... :P

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12 years ago, # |
  Vote: I like it -37 Vote: I do not like it

Thanks for stealing 1.5 hours of my life

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

    You're welcome

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

    You're play only for rank? I play for solve problems!

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      12 years ago, # ^ |
      ← Rev. 3   Vote: I like it 0 Vote: I do not like it

      ***** removed old stupid comments **** upd: sorry for that.

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

        Українець? Или так понтуешся?

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          12 years ago, # ^ |
          ← Rev. 3   Vote: I like it 0 Vote: I do not like it

          ***** removed old stupid comments **** upd: sorry for that.

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            12 years ago, # ^ |
              Vote: I like it +14 Vote: I do not like it

            лох ти а не українець

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              12 years ago, # ^ |
              ← Rev. 3   Vote: I like it -10 Vote: I do not like it

              ***** removed old stupid comments **** upd: sorry for that.

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

                до тебе?

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                  12 years ago, # ^ |
                  ← Rev. 3   Vote: I like it -12 Vote: I do not like it

                  ***** removed old stupid comments **** upd: sorry for that.

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

                  ти дебіл і не розумієш того

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

                  Хохлы, успокойтесь!

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

      I think, in ideal case, it should be a correct balance between the two, with a focus on solving interesting problems

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      12 years ago, # ^ |
        Vote: I like it +2 Vote: I do not like it

      But having a better rank allows you to have harder problems (div 1), and play for rank is stimulating.

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

So from last 4 Codeforces rounds (including this one) only 1 was rated

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

    well this only is only .5 since it's division 2 only; remember, we were out-of-competition competitors :P

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      12 years ago, # ^ |
      ← Rev. 2   Vote: I like it -8 Vote: I do not like it

      But anyway because of technical issues some people from div1 didn't stayed till the end of the round, so the unrated factor affected div1 participants too in some manner.

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        12 years ago, # ^ |
          Vote: I like it +5 Vote: I do not like it

        I agree with that; none of us really stayed till the end, or I wonder if anyone did.

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          12 years ago, # ^ |
            Vote: I like it +5 Vote: I do not like it

          this is my first attempt in online contests... what a pity.

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            12 years ago, # ^ |
              Vote: I like it +11 Vote: I do not like it

            But never the less, the problems are quite nice and interesting to solve. Come here next time and you'll enjoy it:)

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          12 years ago, # ^ |
            Vote: I like it +5 Vote: I do not like it

          Not till the end because I have already submitted for all problems. Just don't have any chances to fix if some won't pass pretests :)

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

            yea that's the issue- you can't really fix now, can you? LOL

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

            so... may you explain how to solve problem E. thanks.

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

          LOL. I did stay till the end.

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

So when can the solutions be judged?

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12 years ago, # |
← Rev. 5   Vote: I like it -7 Vote: I do not like it

hacked by hackers

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12 years ago, # |
  Vote: I like it +3 Vote: I do not like it

When will we be able to run practice?

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

    Obviously, after the finish of the system testing. But, as you see, it hasn't started yet.

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