Greetings, Codeforces Community!

We, the Programming and Algorithms Group, are excited to invite you to our upcoming event, Insomnia 2025! This event is proudly sponsored by Hilabs as our title sponsor, with support from our cherished alumni as co-sponsors.

Format

Insomnia 2025 is an ICPC style team contest where you would be given 10-15 problems in the span of 5 hours, for teams of at most 3 members.

• Date & Time: Saturday, March 1, 2025, at 20:00 IST
• Mode: Online
• Platform: Codeforces, Contest Link
• Registration Link
• Eligibility: Teams of 1-3 Members and Participants may use their own computer (No 1PC per team rule)
• Prizes: Total Prize Pool: 1L INR (84k INR for the top Indian Teams and 16K INR for the top 3 IITR teams)

Only teams comprising of Indian Undergraduate or Postgraduate students are eligible for prizes, but everyone is welcome to participate. It is compulsory to register on Unstop to be eligible for prizes.

Sponsors

None of this would have been possible without the support of sponsors.

• HiLabs: Our Title Sponsor, Health Innovation Labs is an leading AI-powered Health Tech company that delivers technology with the ROI — Return On Intelligence — that health plans need and better access to care. They specialize in converting dirty data into a valuable resource for improving member experiences and increasing efficiency, and they do it on day one,  so health plans can magnify the power of data to improve member experiences and deliver results. You can visit them here.
• PAG Alumni: Thanks to our dear Alumni for contributing to the event as our co-sponsors.

Organizing Team

• The problems have been set by shorya1835, ho-oh, Divine_Spark, CodeLegendX, Ridham., friedel, pramod_17, Cypherre, Krishbansal333, and krishsingla06.
• Thanks to our dear testers: IceKnight1093, Arpa, cry, wuhudsm, Timosh, BreakingGood, Maxima, Ved, sanju77, parthtotalfun, doofushmirtz, Krabbypatty, binary_bae and CatFirstSearch.
• Thanks to Prady, aastik231205, Darsh_Jain, God3l, HackerGupta069, Onslaughtz, and Rem_ for their help in preparing the contest.

Good Luck!!!

UPD 1: The contest is up for registeration now!!! Please note that the usage of AI tools in any way is completely prohibited and will lead to disqualification.

Also, one or more problem can be interactive. So, refer to this blog for more details on how to submit interactive problems.

Please make sure to use fast input/output in your code at all times. For example in C++, The following line should be there:

ios_base::sync_with_stdio(false);cin.tie(NULL); cout.tie(NULL);

UPD 2:

Thanks to everyone for participating, we have removed a lot of AI and plag submissions during contest and will keep checking the submissions and verify the winners. Also, kudos to jtnydv25, for full solve and scaring the s__t out of us by solving M in 19 mins.

I apologize for the AI solutions in H, it was a last minute change and we didn't check it thoroughly, but we have gone through submissions and removed a lot of them which were clearly AI Solves.

Video Sol by Arpa. We will also post an official text editorial soon.

UPD 3:

We have posted an official text editorial here.

We have our midterm exams incoming, so, final result will take sometime as we are yet to run some checks.

UPD 4:

Sorry for the delay, we have finished verifying the winners and here are the final prize winners:

We will reach out to the winners soon to distribute the prizes and Also, Note that all decisions taken are final and binding.