Ashishgup's blog

Invitation to CodeChef July CookOff 2021 (with prizes!)
By Ashishgup, 3 years ago, In English

We invite you to participate in CodeChef’s July Cookoff, today — 28th July, from 8:00 PM — 10:30 PM IST. Note the unusual time.

There will be 7 problems in all divisions.

The contest will be rated for all three Divisions. The July Cook-Off also marks the launch of our new prize structure for global & Indian participants. More details are given below.

Joining us on the problem setting panel are:

Problem Submission: If you have original problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Prizes:

Global Rank List:

  • Top 10 global Division One users will get $100 each.
  • Non-Indians will receive the prize via money transfer to their account.
  • Indian users will receive Amazon vouchers for the amount converted in INR.

Indian Rank List:

  • Top ten Indian Division One coders will get Amazon Vouchers worth Rs. 3750 each.
  • The rest in the top 100 will get Amazon Vouchers worth Rs. 1500 each.
  • First-time winners in Div 2 who make it to the top 200 for the first time will get Amazon Vouchers worth Rs. 750 each.
  • First-time winners in Div 3 players who make it to the top 200 for the first time will get Amazon Vouchers worth Rs. 750 each.

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Good luck and have fun!

Edit: Contest is extended by 15 minutes.

  • Vote: I like it
  • +163
  • Vote: I do not like it

Comments Comments (35)
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3 years ago, # |
  Vote: I like it +27 Vote: I do not like it

Finally a rated contest after a month.

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3 years ago, # |
  Vote: I like it +25 Vote: I do not like it

:( internal error occurred in the system

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

speed chef

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3 years ago, # |
  Vote: I like it +32 Vote: I do not like it
GCDLEN Intented soln
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    3 years ago, # ^ |
      Vote: I like it +9 Vote: I do not like it

    the obvious way takes $$$O(\log^2C)$$$ time, we'll have to do better

    I didn't have to, this easily passed in 1.5s

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3 years ago, # |
  Vote: I like it +33 Vote: I do not like it

Why you want people to get useless WA in https://www.codechef.com/COOK131B/problems/MODEQUAL due to integer overflow? What's wrong with having A[i]<=1e9?

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3 years ago, # |
  Vote: I like it +50 Vote: I do not like it
SPTREE2 Solution
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3 years ago, # |
← Rev. 2   Vote: I like it +57 Vote: I do not like it

Ashishgup, Will it be possible to postpone (by 2 hrs) July Lunchtime as it is clashing with ICPC practice session.

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

    If we postpone it, it will clash with TCO R4. It seems that the clash in unavoidable :(

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3 years ago, # |
  Vote: I like it +74 Vote: I do not like it

I was not aware that contest is extended by 15 mins. I closed my laptop and after 2 mins later I realised it's been extended.

As many new features have been added in Chef (copying sample input) please also make a pop up feature for any announcement.

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

    Also, doubt support too. As we can ask for clarification of problems on codeforces, a similar thing should also be there on CodeChef.

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      3 years ago, # ^ |
        Vote: I like it +25 Vote: I do not like it

      You can ask for clarifications in the comments — we answer them during the contest!

      But yes, I agree — clarification support system should be better.

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    3 years ago, # ^ |
      Vote: I like it +33 Vote: I do not like it

    Issue with pop-up is that CodeChef does not have a registration system yet, so the notification would end up being pushed to everyone using the site at the time.

    I believe CodeChef is working on adding this feature in the future — since it has non-trivial backend work, it may take some time though.

    I believe it's the most important feature required right now.

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3 years ago, # |
  Vote: I like it -16 Vote: I do not like it

Why aren’t you make a team for banning those YouTube channel who spoil the excitement of contest by upload logic even full AC code durning contest?

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    3 years ago, # ^ |
      Vote: I like it +38 Vote: I do not like it

    It turned out that today the distributor could not upload the code faster than me solving the problem (Div 2 Till D), So I'm happy that i did not get affected by cheating and all. Hence, The only solution to this scenario is to just get better than the distributor. Perhaps, It's quite challenging but exciting at same it :)

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3 years ago, # |
← Rev. 4   Vote: I like it +8 Vote: I do not like it

I got WA for one of my solution. So i spent time debugging it.At the last second i did not change anything that could change output but AC anyway. I resubmitted WA solution got AC after the contest. WA verdict sol now showing AC but no announcement about changing test data. why?

p.s: There was an announcement but no pop up.(new at chef). But still i did one wrong submission for this error.Issue has been fixed. Tnx to chef jumped up few ranks :p

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

    In interactive problem, generally you don't have to flush output between consecutive lines. But in the 4th problem today solutions which were not flushing output between consecutive lines got WA. They corrected it after contest.

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

Why codechef don't have more rated contests as Codeforces have?

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    3 years ago, # ^ |
    ← Rev. 2   Vote: I like it +20 Vote: I do not like it

    Maybe lack of problem proposal is one of the reason. Second reason maybe the cost of contest that is roughly INR 4-5 Lakh which in Codeforces is in some thousands. I don't think the money might be the great factor but ya it can be one of the reason, lack of problem proposal remains at first

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3 years ago, # |
  Vote: I like it +28 Vote: I do not like it

As someone who used to hate codechef for their server issues every contest and stopped participating, I must say that the quality of the problems has really gone up! And now I am more excited about the next Lunchtime than CF round 735 :P Can't believe I said that. Kudos to the problem-setters and the admins. All the best!

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

Ashishgup Can you clarify what it means to be Indian in this context? What if one doesn't live in India but has overseas citizenship?

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

Can someone explain how to solve Beautiful Subsequence? I am not able to understand the editorial.

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

Are memory limits on the problems still 1.5 GB ? If not, can you guys add a tab which shows the memory limit of a problem ?

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    3 years ago, # ^ |
      Vote: I like it +19 Vote: I do not like it

    Yeah, the memory limit is still 1.5 GB for the problems, as far as I am aware.

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

How to solve MATBEAUT (Make the Matrix Beautiful)?

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    3 years ago, # ^ |
      Vote: I like it +31 Vote: I do not like it
    Intented solution
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3 years ago, # |
  Vote: I like it +26 Vote: I do not like it

When will we receive the mails regarding prizes for this contest?

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