Invitation to CodeChef March Lunchtime 2019 sponsored By ShareChat

Greetings CodeChef community!

CodeChef’s March Lunchtime 2019 sponsored by ShareChat begins soon so gear up for this exciting short contest with 5 new problems. This is your last chance to reach for the bonus prizes that CodeChef has been giving out all through their birthday month.

ShareChat - India’s fastest growing social network is seeking both interns and full-time employees to join their dynamic team. Job opportunities are open to programmers across the world and internship opportunities are exclusively aimed at final year B.Tech students who have already been placed and looking forward to gaining startup experience. Don’t forget that you must participate in the contest to be eligible for internships and full-time jobs. Visit the contest page for more details.

I hope you will join your fellow programmers and enjoy the contest problems. 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: 30th March 2019 (1930 hrs) to 30th March 2019 (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 20 Indian and top 20 Global school students from ranklist will receive certificates and CodeChef laddus, with which they can claim cool CodeChef goodies. Know more about the laddus here: As CodeChef is celebrating 10 years of cooking, there are additional prizes up for grabs. Know more about it here: (For those who have not yet got their previous winning, please send an email to

Good Luck!

Hope to see you participating!!

Happy Programming !!


How can someone do such huge mistake ?
I wonder if codechef have any tester or statement verifier :expressionless:
How can they forget 0 !!!
I wasted an hour finding the mistake and still couldn’t find it because after looking at first image having all display off I though 0 means everything turned off.
I lost a lot of time doing this question and couldn’t find the mistake thinking that 0 means displaying nothing…
Saw announcement later on
I have been participating on codechef in every contest since December 2017
This was the worst experience ever.