Hello Codeforces !!

I, on behalf of the InfInITy Team, would like to invite you to take part in the 5th edition of IIIT Pune's flagship coding event InfInITy 2k21, a rated contest hosted by CodeChef IIITP Chapter, which will take place on Wednesday, December 22, 2021, at 20:00 IST^UTC+5.5. It is a 3 hr long contest.

The contest is Rated for Div. 2 and Div. 3 on Codechef, but Div. 1 coders are encouraged to participate unofficially as there are prizes for top participants in combined(Div. 1 + Div. 2) ranklist. We'd be offering you 8 problems in Div 2 and 7 problems in Div 3 with varying difficulties.

CASH PRIZES  :

• Top 3 performers  (Div1 + Div 2 combined)  will be awarded cash prize of INR 10000, 7000 & 3000 respectively. Top performer of Div3 will be awarded INR 2000.
• Top 2 Indian participants will be rewarded INR 4000 & 2000 respectively.
• Prizes worth INR 10000 specially for IIIT Pune students.

Contest Link : www.codechef.com/INFI2021
Contest Timing : 20:00 to 23:00 IST
Registration For Prizes : Infinity Website or Google Form

I would really like to thank:

• evilbuggy for providing great feedback on the problem set.

• silentone, still_me, ay21, satty26, reyaan44 for setting & testing the problems with me.

• abhi2402, darshancool25, iscsi, arpan491, DeadlyVelocity for testing the problems and giving valualable feedback.

• The web development team(rakshitjain13, rushitote) for building an awesome website for the contest.

• Codechef for sponsoring the event, their invaluable help and great platform.

• BiT Legion for making this contest possible.

For any queries contact: bitlegion@iiitp.ac.in
Editorials for all the questions will be posted shortly after the contest ends!.

Past problem sets for the event: 2020, 2019

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