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mohabamr's blog

By mohabamr, history, 6 years ago, In English

Hello guys, for those of you who are tired of searching for "what to solve next", my bachelor thesis was to implement a recommender system for competitive programming problems; supervised by Dr. Amr ElMougy and Maged Shalaby

Give it a look and check your recommendations now: https://acm-recommender.herokuapp.com/#/signup

Sign-up (using your codeforces username) then sign-in and check your recommendations in almost no time (just give it a minute or 2).

There would be 10 problems recommended per user, we encourage you to solve them and give us feedback about each recommendation (through the "evaluate" button).

It is very important to evaluate the problems, as this feedback is needed to enhance the recommender and conclude which algorithm is better. So, please don't forget to submit your evaluations!

Thank you and happy coding.

For any problems or suggestions; you can contact me: [email protected]

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

Application error

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    6 years ago, # ^ |
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    please, check now.

    Heroku crashes sometimes and restarts automatically.

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6 years ago, # |
  Vote: I like it +12 Vote: I do not like it

How exactly do you calculate what problems to recommend?

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

It would be really great if it was possible to hide a problem from the list after you solved and evaluated it.

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6 years ago, # |
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Can we have access to your thesis document? What was your approach?

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    6 years ago, # ^ |
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    I still did not submit it, it's a hybrid approach between CF (user-based) and some filtering regarding the tags and difficulty level of the problem.

    I will try to publish it if possible.

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

My recommendations are not generated yet, so, i'll be back

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    6 years ago, # ^ |
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    Same here, I have waited like 20 minutes already.

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    6 years ago, # ^ |
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    don't forget to check again

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      6 years ago, # ^ |
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      Hmm, if the system recommends me problems for the first division, does this mean that I'm ready for the first division?

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6 years ago, # |
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So we can use this to find duplicate problems?

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    6 years ago, # ^ |
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    nope, problems you did not solve, assuming.

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      6 years ago, # ^ |
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      It gave me a problem I solved already: 752B. Maybe because the problem occurs in different contests: (Technocup Div.2, Technocup Div. 1, and official Technocup). Can you look into this? thanks

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6 years ago, # |
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It would be better if it was possible to change recommendations (it's showing easier problems :) ). What can I do if I need harder problems?

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

have done all the problems but no new recommends

is that a bug ?

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    6 years ago, # ^ |
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    nope, the beta version allows you only 10 static problems, but very soon I am gonna change this.

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6 years ago, # |
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It recommended me problems that I already solved on the other division.

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

Currently, anyone with a person username and email(easy to get) can access it with his choice of password. This way the original person can't access his own account.

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    6 years ago, # ^ |
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    I know there is no way of validating, but the original purpose for this website was for a small team to use, I did not expect people would interacte with it like that.

    Anyway:

    1. If anyone faces a problem; they can contact me so I can validate the users myself for now
    2. I will see if I can validate the email with the username from Codeforces API
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      6 years ago, # ^ |
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      just a question, why do you even need a login for your website? why can't user just provide their username to see the recommendations?

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6 years ago, # |
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Its only showing me div2 A,B,Cs. Anyway I can get harder problems?

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6 years ago, # |
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The character '| in my username is not supported :p Can't sign up.

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4 years ago, # |
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I just tried it and it showed Something went wrong: 503 at this page: https://acm-recommender.herokuapp.com/#/recommendations :(

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4 years ago, # |
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Its not working.

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4 years ago, # |
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Something went wrong: 503

:(

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4 years ago, # |
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Its generating a pop-up showing Something went wrong: 503

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

Same here...

Something went wrong: 503

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4 years ago, # |
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Something went wrong: 503 :(