Invitation to CodeChef August Lunchtime 2020

Greetings CodeChef community!

We invite you to participate in the CodeChef August Lunchtime - the 3-hour contest which offers 6 challenging problems to be solved. This will be a chance for you to code and show off your programming skills along with increasing your CodeChef rating.

The problem statements of the contest will be available in English, Hindi, Bengali, Russian, Mandarin, and Vietnamese. Also if you have some original and engaging problem ideas, and you’re interested in them being used in the CodeChef’s contests, you can share them here.

I hope you will join your fellow programmers and enjoy the contest problems. Joining me on the problem setting panel are:

-Setters: Rithvik benritmico Chatterjee, Ritesh rishup_nitdgp Gupta, Ramanan ramzz S, Sawarnik sawarnik123 Kaushal

-Editorialist: Ishmeet psychik Singh Saggu

-Admin: Teja teja349 Vardhan Reddy

-Tester: Yash yash_chandnani Chandnani

  • Statement Verifier: Jakub xellos0 Safin

  • Mandarin Translator: Gedi stzgd Zheng

  • Vietnamese Translator: Team songuku95 VNOI

  • Russian Translator: Fedor gomelfk Korobeinikov

  • Bengali Translator: Mohammad solaimanope Solaiman

  • Hindi Translator: Akash devils_code Srivastava

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: 29th August 2020 (1930 hrs) to 29th August 2020 (2230 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.

Contest link: (

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 10 Indian and top 10 Global school students from ranklist will receive certificates and CodeChef laddus, with which they can claim cool CodeChef goodies. Know more here.

Good Luck!

Hope to see you participating!!

Happy Programming !!


the link in the second paragraph here is not working :wink:

I hope it’s not an ad-hoc question @rishup_nitdgp :stuck_out_tongue:
Just kidding. :stuck_out_tongue_winking_eye:


getting rekt rn

Finally a codeshef contest with good difficulty gradient. Great contest.


Hey, @yash_chandnani, you might want to see my topic
I think one of the problems may be wrong? (Either that or I’m totally misunderstanding something.)


Unfortunately, one of the edge cases in CHEFPART was handled wrongly in the official solution. This has been fixed, all non-AC solutions rejudged, and we will recalculate the ratings for the 2 users who have been affected by this. Apologies for the mistake.

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