July Long Challenge 2019

Greetings CodeChef community!

We bring you the July Long Challenge 2019. Brace yourself for 10 intense days of non-stop coding challenge. All programmers across the globe are welcome to participate. Don’t forget that the problems are available in English, Hindi, Bengali, Russian, Mandarin and Vietnamese.

Additionally, if you have some original and interesting problem ideas, and want them to be used in CodeChef’s contests, you can share them with our admins here: www.codechef.com/problemsetting/new-ideas

I hope you will join your fellow coders and participate in the contest. Joining me on the problem setting panel are:

I hope you will enjoy solving them. Please give your feedback on the problem set in the comments below, after the contest.

#Contest Details:

Time: 5th July 2019 (1500 hrs) to 15th July 2019 (1500 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.

Contest link: https://www.codechef.com/JULY19

Registration: You just need to have a CodeChef handle to participate. For all those, who are interested and do not have a CodeChef handle, are requested to register in order to participate.


Top 20 performers in Indian category and top 10 performers in Global category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. First to solve each problem except challenge - 100 laddus. Know more here: https://goodies.codechef.com/. (For those who have not yet got their previous winning, please send an email to winners@codechef.com)

Good Luck!

Hope to see you participating!!

Happy Programming !!

The contest is over. Congrats to the winners!

Div 1

  1. ACRush
  2. andres96
  3. romawhite
  4. rumblefool
  5. Oleg

Div 2

  1. loopfree
  2. marco_l_t
  3. alina_alina
  4. spookywooky
  5. dbh_

Very excited :slight_smile: :slight_smile:


I hope we will meet in contest instead of discuss. :slight_smile: :slight_smile:


The Grandmaster tester from Codeforces(Alipasha Montaseri and Kasra) and @alei as an admin. So,very excited :slightly_smiling_face:!!


So much excited for July Long . 10 days 240 hours … Let’s do this :slight_smile:

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@aviroop123 excited to see your question :slight_smile:


:3 I am psyched! XD :slightly_smiling_face:

Predictions for this contest - Div 1 and Div 2.

You can use ccrate for future predictions. Blog for the same.

Does anyone know where we can host Node JS projects for free? Currently, I’m using OpenShift. It’s free but they change the project URL every two months.


Hi , unable to submit due to server overload since last 90 mins, any idea how to resolve issue?

It seems a little difficult.


heroku , firebase are the best options

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Why July Long is not sponsored by Sharechat this time?

I have tried heroku for my first dummy app. It was too slow. Will try for this one too and also on firebase. Thanks for the suggestion! :slight_smile:

UPD - It’s working perfectly fine with heroku! I think I will stick with heroku then. Thanks a lot!

Again havent been able to submit for the last 60 mins , is the issue just with me or others are also being affected?

All my submissions are being marked down as internal error , while all submissions before and after me are being judged , can u please look into this @admin . Also i hope Internal error wont be counted for total submissions , could u pls clarify on that too

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probably there is something wrong in your code. Currently CodeChef is missing the idless limit exceed, it just displays as internal error.

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Yes, that was the case , thanks a lot !! :grin:

You can use heroku. It’s free and it’s very well documented for deployment of NodeJs application. The only problem is if you want to serve images. For images you can use Amazon S3. As in herouku, if you store images in your application then once your application goes to sleep it will delete all images.
Other than this Heroku is very good.

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no need of s3 . imgur.com is enough

Yes, it’s working very well right now. :slight_smile: I guess it was working slow for my first app because they decrease the performance for unused applications which is not the case for this one. I’m lucky since I won’t need any images for this project. :wink: