cpdojo's blog

Introducing cpdojo
By cpdojo, history, 21 month(s) ago, In English

Hi Codeforces community, I have created a tool for helping out CF community — CPDojo.

This tool can be used for monitoring ourselves and also to filter problems.

Some of the features added as of now are:

  1. Problems filtering based on number of solves, problems tags and ratings. Like if you need problems which are solved by atleast X people and utmost Y people, then you can filter problems that way.

  2. You can also view how much problems you have solved between 2 time periods based on the problem ratings. This will help us to track exactly how many problems we solved during past 3 months and then we can make decisions based on that analytics.

  3. You can also view how many problems of particular type you have solved, which will eventually contribute to your progress tracking.

Sample screenshot:

I am planning to add additional functionalities too in future... If you have some interesting suggestions please do let me know :). Also let me know if you have any improvements that can add more value to the tool. Thank you !

Note : I am working on mobile UI currently. It is under development, so it is not recommended to view it in mobile. Thank you for your patience.

--------------------------------- New minor updates -------------------------------------------

Added Direction texts to show some functionalities on the platform

------------------------------------------------- New update -----------------------------------------------------------------

-- Added provision to exclude problem types (get all problems having type as graph but it should not contain tree problems).

-- Added a table to see all attempted problems which are not solved.

-- At the chart displaying number of problems solved in time range (based on ratings), at it's legend user will be able to see the total number of problems solved within a given time range.

------------------------------------------------- New update -----------------------------------------------------------------

-- Added Problem Recommendation system. This allows a user to particularly train for reaching their next rating group milestone. (i.e from Specialist to Expert)

-- Added complete change in CPDojo UI.

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Comments Comments (61)
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21 month(s) ago, # |
  Vote: I like it +1 Vote: I do not like it

Thanks, it is very helpful. Below are my suggestions if reasonable.

When filter problems, 1. Can we exclude Tag also? ( like include graph and exclude tree) 2. Can we add more fancy functionality to combine AND, OR, EXCLUDE among tags?

User details: 1. Can we add total number accepted for time range, (just seeing details on problem distribution.) 2. Can we add problems attempted but not unsolved?

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    21 month(s) ago, # ^ |
      Vote: I like it +4 Vote: I do not like it

    Hi Cheesma, thank you for your valuable feedback.

    When filter problems, 1. Can we exclude Tag also? ( like include graph and exclude tree) 2. Can we add more fancy functionality to combine AND, OR, EXCLUDE among tags? ---> I'll start working on this, mostly I'll be adding a feature to also exclude problem tags as you have mentioned in this comment. Thank you for pointing this out.

    User details: 1. Can we add total number accepted for time range, (just seeing details on problem distribution.) 2. Can we add problems attempted but not unsolved? ---> For this one, can you please elaborate it a bit more... because the first chart is currently displaying the number of accepted problems only, but, it doesn't count any problem twice (i.e we are taking only the first solve for a particular problem). Please help me to understand your comment regarding user details :). Thank you !

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21 month(s) ago, # |
  Vote: I like it +3 Vote: I do not like it

Here is an important feature you can add:

  • Virtual contest selection: A list of users will be provided. Filter contests where all the problems are unattempted by everyone.

Also, consider customizing the parameter "items per page" in the problems section.

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    21 month(s) ago, # ^ |
      Vote: I like it +8 Vote: I do not like it

    Hi adnan_toky, thank you for your valuable feedback. I have noted down these changes. Will implement and add these changes to the platform in near future.

    Cheers :)

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21 month(s) ago, # |
← Rev. 4   Vote: I like it 0 Vote: I do not like it

Deployment complete.... changes are live now

---- New updates 1 ---------------------------------------------------------------------------------------------------------

  1. Added sorting on columns — ratings and number of solves --> Tap on table header for that column and it will be sorted. For now supporting only ascending sorting of ratings column and descending sorting for number of solves column.

When you sort ratings column, problems will be sorted first by ratings (in asc order) and then tie is broken by sorting number of solves (in desc order)

When you sort number of solves column, problems will be sorted first by number of solves(in desc order) and then tie is broken by sorting ratings (in asc order)

---- New updates 2 ----------------------------------------------------------------------------------------------------------

  1. Added a checkbox (must include selected tags) to ensure that the problems which you get will have all tags which you have selected. This is helpful in case you need to get problems having dp and trees both together (for topic like dp on trees).

UPDATE: forgot to build the backend before deploying... now all features will be working :)

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    21 month(s) ago, # ^ |
    ← Rev. 16   Vote: I like it -8 Vote: I do not like it

    Hi, cpdojo, Thanks you for above live features which now I use everyday. The following request maybe a very interesting feature to be added. It will be very helpful for my training.

    PROBLEM FILTERS: my request is just to add start/end time periods as inputs (the default is All Time, same as without this feature), so that I can filter out exactly what problems a CFer have solved during this specific period. of course, the current filter/sort feature can help to filter/sort their solved problems by tags/difficulty at your need.

    Example Interesting use case

    1. one of my friend jumps from Pupil to Master using only 9 Months, his training method is to just solve constructive problems. So this new feature can help filter out exactly what constructive problems he solved during this period when he improved dramatically. https://mirror.codeforces.com/blog/entry/66715?#comment-507869

    2. some CF ID have very interesting rating graphs, where in a short time, their rating improve dramatically, so it will be very interesting to know what problems(specific to tags/difficulty) they solved during these short period, so you can sort those problems and start to solve these problems(specific to tags/difficulty). for example, this CFer has become grandmaster just in 2 years. It may be interesting to pick up problems in the period when he improves fast and you can start sort by difficulty and solve them. https://mirror.codeforces.com/profile/BucketPotato

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      21 month(s) ago, # ^ |
      ← Rev. 2   Vote: I like it +5 Vote: I do not like it

      Hi Chessma, this feature is live now... You can find it under User Details >>> User's solves tab... Cheers :)

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        21 month(s) ago, # ^ |
        ← Rev. 2   Vote: I like it -8 Vote: I do not like it

        Hi cpdojo, Thanks for the reply. I checked User’s solves tab, it lists solved problems and difficulty. But I can not filter by tag or sort by difficulty as I do in the PROBLEM FILTER section.

        Is it possible to just add time period inputs in problems filter section, so that the existing filter/sort function can be leveraged?

        Cheers:).

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          21 month(s) ago, # ^ |
            Vote: I like it +5 Vote: I do not like it

          Hi chessma, both problem filter and user details section use different data sources. Also, Problem filter finds all problems irrespective of user/handle, i.e all problems that fit in filtering criteria (ofc limited by number of records). So I thought it would be inappropriate to add it in problem filter section.

          But I can see that filtering is needed for user's solves tab too... So yeah I will think of some way to add it to UI.

          Thank you for your valuable feedback :)

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21 month(s) ago, # |
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--- New updates ---

Contest filter has been added, where you can search for contests for practicing. It will show up all contests for which you haven't solved/attempted any problems.

You can also add group members (but only upto 5 members)

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21 month(s) ago, # |
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---- New update ----

Added table so that you can view some user's all solved problems in a given time range.

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21 month(s) ago, # |
← Rev. 3   Vote: I like it 0 Vote: I do not like it

If anyone has some other interesting idea which can be integrated into CPDojo pls do let me know ! :)

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    21 month(s) ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    pls add dark mode

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      21 month(s) ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      Hi red24, thank you for your valueable suggestion :). I have added this to development plan. Will make it live along with other features.

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20 months ago, # |
  Vote: I like it +8 Vote: I do not like it

pls add a feature to exclude problems that occured before some date or round number since old problems are much diff than new ones

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    20 months ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    Hi red24, I've noted this change! I will add this feature to the platform in near future. Cheers :)

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18 months ago, # |
  Vote: I like it +3 Vote: I do not like it

CPDojo went down because of SSL certificate issues... Is up and running now !

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    18 months ago, # ^ |
      Vote: I like it +1 Vote: I do not like it

    Hi cpdojo, Is it possible to add features below? For example, I want to search all CF problem containing key word “XOR” either in problem title or problem statement? It will return me a list problems with such key word and sort in increasing difficulty?

    https://mirror.codeforces.com/problemset/problem/1722/G

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17 months ago, # |
  Vote: I like it +1 Vote: I do not like it

Hi CF community, I've added a functionality to search for problem statement based on certain specific keywords. Here we have actually prioritized match of problem statements with querying keywords, so it won't be sorted by rating, but is sorted on the basis of best match.

You can check it out from search button on the left nav-bar ! Cheers :)

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17 months ago, # |
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Really Wonderful tool.But it should be able to save particular username instead of writing again and again for analysis.

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    17 months ago, # ^ |
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    Hi d_sqaure, this maybe a product defect. Can you please give me the steps to reproduce this defect ? We'll try to get it resolved asap !

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

      1.Log in to CPDojo.(this too has bug,it shows google popup even after login). 2.Go to user details.It ask to write username.When you press enter it will show all the analysis very well,but when you swich to another tab and back to user details username disappears it again ask to write username.

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        17 months ago, # ^ |
          Vote: I like it +3 Vote: I do not like it

        Hi d_sqaure, we have noted these changes... will work on this and get it resolved asap ! Cheers :)

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17 months ago, # |
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Filter EDU round by difficuty: currently in "contest filter"session, I saw EDU is not separate from div2 and there is no sort function on difficulty in "contest filter" session.

is it possible to separate EDU round out and add sort by difficult for the filtered divisions? Thanks

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    17 months ago, # ^ |
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    Hi chessma, we have planned to add this feature to cpdojo. Will update you soon :)

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      11 months ago, # ^ |
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      Could you also come back on this feature? Thanks

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        11 months ago, # ^ |
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        Hi chessma, this has already been added.... I've added a new tab in 'Contest Info' section for Educational CF rounds. You can check that ! :) cheers !

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          11 months ago, # ^ |
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          I see. it is possible to sort problems just within EDU round by difficulty?

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            11 months ago, # ^ |
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            It can't be done so easily though...

            For now I am mainly focusing on some AI/ML things to add to the product to help CPers to rank up in much better way...

            I've noted this requirement though... will implement it in near future ! :)

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16 months ago, # |
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Is this site down (problems are not visible) or is it a problem on my end?

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16 months ago, # |
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Hi Cpdojo, for problem filter session, could you enable sort by problem ID (PID）? since I want to practice most recently problem per rating.

I think it will not cost you 10 mins. thx

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    11 months ago, # ^ |
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    Hi welcome back. Could you please take a look above request?

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      11 months ago, # ^ |
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      Hi chessma, I am working on it. I'll make this live within next 4-5 days. Thank you for your patience !! :D

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15 months ago, # |
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cpdojo not workings anymore :(

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12 months ago, # |
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Hi all, I am deploying some fixes in the backend code so CPDojo backend will be down for a while ! Thanks for your patience...

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

Hi Codeforces community, I have added a big change to problem recommendation algorithm for better and accurate recommendations. Please make sure to check it out :)

Thank you !

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12 months ago, # |
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Deploying new changes to CPDojo... it'll be unavailable for sometime...

Will update here once it's up ! Thank you for your patience !

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12 months ago, # |
  Vote: I like it +1 Vote: I do not like it

Hi everyone,

CPDojo is up now !!

I've deployed a big change for changing whole look and feel of the website.

Also along with these changes I've added a fix in our recommendation system.

Since this is a very large change, pls try it out and let me know if you see any bugs or issues.

Will be helpful if you share your feedbacks and thoughts as well :)

Cheers !

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12 months ago, # |
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Auto comment: topic has been updated by cpdojo (previous revision, new revision, compare).

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11 months ago, # |
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Auto comment: topic has been updated by cpdojo (previous revision, new revision, compare).

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11 months ago, # |
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Why there isn't rating group for newbie.

Is it like I click on pupil if my next target is pupil?

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    11 months ago, # ^ |
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    Hi Ishan, Yeah it means that your next target is Pupil. So, it'll provide you with problems which will be of great value if you solve them and help you the best in reaching Pupil.

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11 months ago, # |
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Hi cpdojo,

I using the Problem recommender from quite some time; it is an excellent tool and recommending excellent problems, but here you can add a feature to show the difference of problems solved and remaining to solve. As we keep on solving, it gets difficult to classify problems which are solved and which need to be solved.

I hope this will help a lot of other users too.

Thank you.

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    11 months ago, # ^ |
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    Hi jagannath_123,

    I am very glad to hear that CPDojo recommender has helped you in your progress. Thanks for sharing your valuable feedback :)

    As for the feature request, it has been added and deployed as well.

    Peace !

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      11 months ago, # ^ |
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      Excellent work cpdojo, I appreciate for the the quick action you have taken.

      Wishing you a grate success Thank you

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11 months ago, # |
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it's very helpful thank you so much bro but there's one thing you should do: you definitely should add dark mode for your website!!

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    11 months ago, # ^ |
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    Hi Ag_Zenitsu, I am glad that CPDojo platform is helping you :) Thank you so much for letting me know !!!

    Implementing dark theme will take sometime, but it is in my pipeline. In near future it will surely be implemented.

    Peace !

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10 months ago, # |
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Problems from latest contests is not being added in filter page. Please fix this issue.

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    10 months ago, # ^ |
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    Hi tahmidarefin, can you please let me know which contest's problems you didnt find in filter ? It'll be helpful for debugging from my end. Thanks !

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      10 months ago, # ^ |
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      If I sort the problem by date column, the latest date start from September, 24. But many contests is happened after that date. Do you understand the issue, now?

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        10 months ago, # ^ |
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        Got the issue, will let u know once the issue is fixed ! Thanks

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        9 months ago, # ^ |
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        This problem is happening when a problem doesn't have it's rating updated. That's why newer problems were not visible because of no rating assigned to it.

        We are looking into this problem and make changes accordingly! Thank you for your patience :).

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9 months ago, # |
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filter and search is not working

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11 days ago, # |
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Nothing happens when I click "generate"...

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    11 days ago, # ^ |
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    Hi macaquedev, this site is not functional anymore.

    I have shutdown all backend services which I hosted for this application. It doesn't work anymore.

    Only some pages which works on frontend and CF apis will keep working !!

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      11 days ago, # ^ |
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      why not? AI problem recommendation has potential to be very helpful for a lot of users...

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        11 days ago, # ^ |
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        Yeah you are right... since I was the only one who used to work in the project it was getting very difficult for me to manage alongside my job work !!

        Also cloud instances doesn't come for free :p

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