prayutsu's blog

CfLockout — Practice Codeforces Problems with Friends in a Competitive Way
By prayutsu, history, 2 years ago, In English

Hi Codeforces,

I have tried making a web app — CfLockout that allows you to create practice contests of Codeforces problems. You can select different ratings of the problems and only the problems which are unsolved by all the participants appear in the contest.

Only the user who solves the problems first is awarded the score, so be quick to solve the problems ;)

Website link — https://cflockout.vercel.app Github link — https://github.com/prayutsu/cflockout

Note — Email verification mails may lend in your spam folder, mark them not phishing to be able to click the verification links.

Do star the repository if you like the project.

Update #1: The maximum number of problems allowed has been increased to 10 and the maximum difficulty of the problems is now 3500.

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

Comments Comments (29)
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2 years ago, # |
  Vote: I like it +6 Vote: I do not like it

Great platform! Looking forward to practice on this.

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2 years ago, # |
← Rev. 2   Vote: I like it +10 Vote: I do not like it

I haven't tried it yet but it looks pretty good!

I think the limit for problems per contest is too small, could you please make it larger?

Also, why are there limits for difficulty chosen?

Thanks!

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    2 years ago, # ^ |
    ← Rev. 3   Vote: I like it +14 Vote: I do not like it

    Can you suggest any number?

    I'll increase the maximum difficulty of the problems to 3500, and I am thinking of limiting the max number of problems to 10.

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

      I'd say around 10?

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

        I have changed the limits. Could you please check?

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

This looks amazing, and I will be using this a lot! Thank you for making this website!!

I want to recommend an additional feature to make website even better. Perhaps the problems could be chosen in a way such that none of the members have solved it, and if it is impossible, then perhaps there can be a warning message.

What do you think? I'd love to hear back from you.

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

    Thanks for your suggestion!

    Actually, the current functionality does the same, the problems are unsolved by all the users.

    And if such a contest can't be prepared, a warning message should be displayed. Only thing is — I couldn't test if the warning message is actually being displayed or not :(

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

      Thanks for creating this website, it looks amazing and hopefully I'll be able to get better by practicing using this. Great work!

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

Looks clean and cool

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

When Dev God does CP!

This is what they create

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

Looks so much good! <3

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

Amazingly designed, thanks for this :D

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

The UI looks clean and the platform also seems to be really helpful. Thanks for this.

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2 years ago, # |
← Rev. 2   Vote: I like it +4 Vote: I do not like it

Beautifully designed with a thoughtful idea. Amazing website (^^)!

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

great platform.could you please add tags for the problems to practise along with rating

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

    I'd add this to todo list and try to add it soon.

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

I was looking for such a platform. Thanks!!

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

Awesome website! Great Work!

I would like to request some features, (1) can you do something to make the points get decrease with time? and (2) of course a custom rating feature to have a track on progress.

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

Is account creation working? I didn't receive the email (I checked spam too).

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

    Everything is fixed now, please refresh the page and try again.

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

could u possibly add sign in w/ google for convenience, ty

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

You are a gem

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

Well, it's cool, but I'd need some friends first lol

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

The Site's not working shows Network error when i try to create contest

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

Site shows Error:Network Error when I try to sign in.

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

    I don't even get a confirmation email. Not in spam either. Both Gmail and Yandex...

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