kingofnumbers's blog

if IOI2013 problems were codeforces problems
By kingofnumbers, 11 years ago, In English

if IOI2013 problems were codeforces problems what do think the most appropriate rank for those problems?

in my opinion:

Dreaming: Div1 B/Div2 D

Art Class: Div1 C/Div2 E

Wombats: Div1 D

Cave: Div1 B/Div2 D

Robots: Div1 C/Div2 E

Game: Div1 C/Div2 E

please share your opinion.

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11 years ago, # |
  Vote: I like it -8 Vote: I do not like it

Art Class would not be a CodeForces problem.

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

    yes, but one can assign a rank for it just for showing the difficulty of this problem

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

I don't know. I feel like they're incomparable. IOI and CF problems have different styles I think...

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

    Well, I think this is true only with "art class" and "cave" but the others are normal problems

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11 years ago, # |
  Vote: I like it +68 Vote: I do not like it

Oh.. Game and 4 more problems without feedback are as easy as two-hour div two contest without tokens for you .. Where can I join your fan club?

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11 years ago, # |
← Rev. 2   Vote: I like it +84 Vote: I do not like it

well, I disagree with your point.It seems you're really genius and can solve those problems in seconds, but as for a normal guy like me, those problems are not that simple.

My opinion:

Dreaming: Div1 B/Div2 D

Art Class: Div1 D

Wombats: Div1 E

Cave: Div1 C/Div2 E

Robots: Div1 C/Div2 E

Game: Div1 E

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11 years ago, # |
  Vote: I like it -19 Vote: I do not like it

Many people are surprised of my opinion , actually I think IOI2013 problems are the easiest year than other previous years.

also I want to say that a lot of Div1 D and Div1 E problems in codeforces are very harder than IOI problems

for example what problem do you think is easier IOI2013 dreaming or 288D - Polo the Penguin and Trees ?

note that both problems are related to trees

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

    Polo the Penguin and Trees is Div1 D problem. Nobody said that dreaming from ioi2013 is as hard as div1 D problem.

    After 10 (5+5) hours of solving with full feedback, nobody did full score on IOI 2013, even IGMs from CF. I don't think that IOI 2013 problems are easier than Div1 round. I think, if you give 5 hours and full feedback for almost any div1 round, at least 1 IOI 2013 participant will make full score.

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      11 years ago, # ^ |
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      Well, 5 hours with out full feedback for first dat, to be honest :)

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        11 years ago, # ^ |
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        How do you mean full feedback? Did you was able to see your final result during the contest?

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          11 years ago, # ^ |
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          Yes, can submit your solution and the grading system tells you how many points you have for the submitted solution. But on the first competition date, the grading systems were slow. I think I had no feedback at all in the last hour... :(

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

      You should consider that 2 hours only is making div1 Round is harder

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        11 years ago, # ^ |
          Vote: I like it +9 Vote: I do not like it

        But there is nothing about time in your comment. You just said that div1 problems are harder than IOI 2013. IMHO, in 2 hour contest it is almost impossible to solve Game, Wombats, Cave and Art Class. As you wrote in post:

        Game — div1 C

        Wombats — div1 D

        Cave — div1 B

        Art Class — div1 C.

        They are a harder than div1 problems.

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

          Well, I was just replying to this sentence

          if you give 5 hours and full feedback for almost any div1 round

          anyway, if you want to compare IOI contest with codeforces div1 contest , you should compare them as IOI contest has 5 hours and codeforces contest has 2 hour

          but if you want to compare between problems ,then you shouldn't consider the time nor the feedback

          Edit: also when I'm giving a codeforces rank to IOI problem I'm just showing the difficulty of these problems(in my opinion) , not making them in a codeforces contest

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11 years ago, # |
← Rev. 2   Vote: I like it +3 Vote: I do not like it

Here's what I think:

Dreaming: 3/5 stars

Art class: 4/5 stars

Wombats: 5/5 stars

Cave: 2/5 stars

Robots: 3/5 stars

Game: 4.5/5 stars (3 stars without the final subtask introduced in the night before the competition)

And I don't like comparing apples to bananas. Specifically when one of the task wouldn't ever appear in CF Round. Hence, stars.

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