kingofnumbers's blog

By kingofnumbers, 8 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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8 years ago, # |
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Art Class would not be a CodeForces problem.

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    8 years ago, # ^ |
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    yes, but one can assign a rank for it just for showing the difficulty of this problem

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8 years ago, # |
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I don't know. I feel like they're incomparable. IOI and CF problems have different styles I think...

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    8 years ago, # ^ |
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    Well, I think this is true only with "art class" and "cave" but the others are normal problems

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8 years ago, # |
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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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8 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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8 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 - Пингвин Поло и дерево ?

note that both problems are related to trees

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

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        8 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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          8 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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      8 years ago, # ^ |
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      You should consider that 2 hours only is making div1 Round is harder

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        8 years ago, # ^ |
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        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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          8 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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8 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.