sevlll777's blog

Codeforces Round 1004 (Div. 1, Div. 2)
By sevlll777, 39 hours ago, In English

Hello again, Codeforces!

I am glad to invite you to Codeforces Round 1004 (Div. 1), Codeforces Round 1004 (Div. 2), at Feb/11/2025 17:35 (Moscow time).

In Division 1 you will be offered $$$6$$$ problems. In Division 2 you will be offered $$$7$$$ problems. One of the problems in Div.1 will be divided into 2 subtasks. Round duration is set to be 2 hours.

Also, both divisions contain at least one interactive problem(s), so be prepared for those! Guide for interactive problems

I would like to thank,

As always, we hope you will like the problems. Have fun!

Score Distribution:

Div. 1: $$$750$$$ — $$$750$$$ — $$$1250$$$ — ($$$750$$$ + $$$1250$$$) — $$$2000$$$ — $$$3000$$$

Div. 2: $$$500$$$ — $$$1000$$$ — $$$1250$$$ — $$$1750$$$ — $$$1750$$$ — $$$2250$$$ — $$$3000$$$

  • Vote: I like it
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38 hours ago, # |
  Vote: I like it +32 Vote: I do not like it

As a tester, I must say, FairyWinx is so orz.

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    36 hours ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    As a passerby (can't participate because no time), I must say, FairyWinx is so orz.

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36 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

hmm unusual score distribution D and E are same

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36 hours ago, # |
  Vote: I like it -103 Vote: I do not like it

As a tester, I have a proof that upvoting this comment will lead to positive delta. But the proof is too long to fit the margin.

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36 hours ago, # |
  Vote: I like it +10 Vote: I do not like it

Good luuuck Everyone

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35 hours ago, # |
  Vote: I like it +3 Vote: I do not like it

Hello, could someone please tell me when Codeforces typically runs the plagiarism check? For example, how many days after a contest does it occur? Also, for round 1002 div 2 , have the plagiarism checks (and the process of skipping certain solutions) been completed, or are they still pending?

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    12 hours ago, # ^ |
    ← Rev. 2   Vote: I like it 0 Vote: I do not like it

    they run them randomly ig. and yes they're pending since a long time

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33 hours ago, # |
  Vote: I like it -75 Vote: I do not like it

Authors should know that many aren't participating in rounds that have interactive problems, it's not good for you.

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    24 hours ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    I do not think so. Always avoiding interective problems is not good for your coding ability.

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    23 hours ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    Just write interactor in ~5 minuts and will be happy)

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32 hours ago, # |
  Vote: I like it +14 Vote: I do not like it

Bring Reporting Option in Codeforces MikeMirzayanov , so that the community can help cleaning away cheaters.

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31 hour(s) ago, # |
  Vote: I like it 0 Vote: I do not like it

Every problem starts with Hello-World but ends with infinite possibilities

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31 hour(s) ago, # |
  Vote: I like it +28 Vote: I do not like it

As a tester, FairyWinx orz

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29 hours ago, # |
  Vote: I like it +21 Vote: I do not like it

As a tester, I should say, setters made one of the best interactive problem I've ever seen

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29 hours ago, # |
← Rev. 2   Vote: I like it +30 Vote: I do not like it

As a coordinator, instead of disliking the post, disliking my comment!

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23 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

my aim of this contest is to get rating 100+

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14 hours ago, # |
  Vote: I like it +5 Vote: I do not like it

Div.1 A=Div2. C or E?

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

    Usually, div 1 A = div 2 C

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

      But if div 1 A = div 2 C, Div.1 D should be Div2.F, but Div.2 F isn't divided into 2 subtasks.

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

        Maybe they didn't just copy and shift the problem set, or used only the easy version of div 1 D in div 2.

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

    I think this time Div 1A=Div 2D

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14 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

As a tester, problems are exciting. I recommend participating, and wish you good luck and have fun.

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

Finally, interactive problems are coming...

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

hello

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

Wish to reach Master!

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

why there are different score distributions in div1 and div2 ?

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9 hours ago, # |
← Rev. 2   Vote: I like it -8 Vote: I do not like it

azerbaycanli qaqaslar hardasiz?

C++

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9 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

Hi! coders.

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8 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

This might be a round where tourist will get his badge back ||

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

Also, both divisions contain at least one interactive problem(s), so be prepared for those!

After a long time, yeahhhhhh

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

I'm a bit confused on how to efficiently write code for the interactive problems

From the linked post: "Input/output in interactive problems works much slower than in usual problems — try to use scanf/printf instead of cin/cout in С++, BufferedReader/PrintWriter in Java and etc."

Does this mean in Java, we should use BufferedReader/PrintWriter? Or that instead of using Bf/Pw we should use scanner?

And if the former, I guess all I need to do is write pw.flush() at the end of my code and it should behave somewhat benign?

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6 hours ago, # |
  Vote: I like it 0 Vote: I do not like it

From the score distribution, I would guess the 2 Div. 1 750s are the same as the 2 Div. 2 1750s.

Then the Div. 1 1250 = Div. 2 2250

And then Div. 1 2000(not the (750+1250) one) = Div. 2 3000

Now I'm thinking why they did not put the (750+1250) one in Div. 2.

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    4 hours ago, # ^ |
    ← Rev. 2   Vote: I like it -6 Vote: I do not like it

    There are already 7 scoring opportunities in Div2.

    I'm guessing they didn't want to increase it even more to 8 so put the hard version only in Div2.

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