Hi,

I have seen a lot of chess tournaments publishing performance rating. It can be a really good motivator to see at what rating did you perform in the last few contests.

Not sure how to ask for this feature, so posting a blog. Can we please have this feature in CodeForces?

Thanks in advance!

Namaste all!

The first contest of the final round of ICPC Preparatory series is going to happen on 25th September, 20:00 (IST). The contest problems are set by team Akatsuki (pakhandi, aditya1495, pscs27, deathsurgeon, sarveshmahajan, harrypotter192).

Link to the contest page.

The list of participants who have qualified to finals was published in here.

More information regarding the contest can be found here in this blog post.

Hope you guys enjoy the problems!

Brace yourselves, Insomnia is coming!

PAG and SDSLabs, IIT Roorkee bring to you their flagship programming contest, Insomnia'16.

Contest begins 21:00 IST on 9th of April, 2016

It will be a team event (upto 3 members). Languages allowed are C/C++ and Java. The contest will consist of 20 problems, tough enough to keep you engaged for the entire duration. It is being conducted on our own platform, CodeVillage.

Carrying forward the tradition of Insomnia, which started as an overnight programming contest, it is the second consecutive time that it is being organised as an 24-hour contest.

Problem setters include members of 11coders, ACM-ICPC world finalist for this year and previous world finalists as well.

Follow the event at our facebook event page.

Update:
Cash prizes worth 40K INR to be won!
Overall: 1st Prize — Rs. 15,000 2nd Prize — Rs. 10,000
Indian Teams: 1st Prize — Rs. 10,000 2nd Prize — Rs. 5,000

Update 2: 3 hours into the contest! Out of 350 submissions, 110 have been accepted. 181 teams are solving our problem set.

nfssdq and waisw are on top after solving 6 problems, and ctuFIT is following them on third place after solving 5 problems. 8 problems are still unsolved. Register now and solve them!

Update 3: With just a little below 9 hours to go, we have a new participant, M3M3T3M3 (izrak) from Sydney, who is Red on Codeforces, on top our leaderboard after solving 12 problems.

He is closely followed by algoogla who have 11 ACs, and angleiitd is on third with 9 correct submissions.

4 problems still unsolved! Register at https://codevillage.sdslabs.co/ to see if you can solve them.

Update 4: 6 hours remain!

It's all one way traffic at the top of the leaderboard, with M3M3T3M3 solving 16, ahead of algoogla who have 13 ACs. Anta is not too far behind with 12 correct submissions.

40K at stake. Who's going to take it all?

Follow the leaderboard here: https://codevillage.sdslabs.co/competitions/insomnia16/leaderboard

Update 5: With less than 3 hours to go, anta has overtaken izraq to reach the top of the leaderboard. Both have 17 accepted submissions! anta who has been so far solving all problems sequentially, now faces the hardest problem of the set, yet unsolved. It's going to be interesting to see how this goes.

Try the problems at https://codevillage.sdslabs.co/

Final Update: What a thriller!
anta manages to submit Problem S in the last 5 minutes of the contest to clinch the top position in the leader board. Here are the winners:

Overall Winners:
1. anta
2. algoogla

Indian Winners:
1. angleiitd
2. Survivor
The winners shall be contacted soon regarding their prize money.

We hope you enjoyed the problem-set. The editorials will be shared shortly.
Meanwhile, kindly fill this feedback form, so that we can improve your experience with us. We would love to hear from you. Feedback form

You can see the full leader board here.

After Contest: Thanks everyone for making Insomnia'16 a successful event!
Problem Set — https://goo.gl/SOrLX3
Editorials — https://goo.gl/dT2l1k

For any doubts/queries, feel free to post on PAG's FB Group.

Hello Codeforces Community!

As we know that the first 9 contests have come to an end now, the cumulative rankings have been calculated and the teams which will be advancing to the final series have been announced in the following links:

https://www.codechef.com/download/IPC/2015/results_1.pdf
https://www.codechef.com/download/IPC/2015/results_2.pdf
https://www.codechef.com/download/IPC/2015/results_3.pdf

Congratulations to everyone who has made it to the finals! The dates for finals will be announced soon.

For further information regarding the contests, please visit the website.

We gladly invite all the programmers around the world to take part in the Pool C contests of "IPC ACM ICPC PREPARATORY SERIES"

This is a team contest (upto 3 participants in a team) of 5 hours each with ACM ICPC rules, organized on CodeChef.

You can read more about the contests, schedule, event format and rules from the previous blog post and website.

The Schedule of the Pool C contests is as follows :

You can register for the contest at https://www.codechef.com/teams/register/IPC15P3A

Eligibility Criteria

The IPC programming series, though aimed at ACM ICPC aspirants, is not limited to them. Anyone who wants to try their hand at the problems from some of the finest programming minds in India can do so. Yes! It is open to all the programming enthusiasts across the globe.

Update The second contest of pool C by team Akatsuki has just started! Happy Coding!

Update 2 The third contest of this pool is going to start in less than half an hour! Get your coding shoes on!

We gladly invite all the programmers around the world to take part in the Pool B contests of "IPC ACM ICPC PREPARATORY SERIES"

This is a team contest (upto 3 participants in a team) of 5 hours each with ACM ICPC rules, organized on CodeChef.

You can read more about the contests, schedule, event format and rules from the previous blog post and website.

The Schedule of the Pool B contests is as follows :

You can register for the contest at https://www.codechef.com/teams/register/IPC15P2A

Eligibility Criteria

The IPC programming series, though aimed at ACM ICPC aspirants, is not limited to them. Anyone who wants to try their hand at the problems from some of the finest programming minds in India can do so. Yes! It is open to all the programming enthusiasts across the globe.

Update:

The leader board of the first contest can be found here. Congratulations Mateusz Radecki for a convincing victory, by solving one problem more than 2nd ranked team!
The second contest of the Pool B is going to start in less than 2 hours.

Update 2:

The leader board of the second contest can be found here. Congratulations Evgeny Savinov!
The third contest of the Pool B is going to start in less than 8 hours.

Update 3:

The leader board of the third contest can be found here. Congratulations kut_pioneer!
Interestingly first ranked teams of all the 3 contests solved a problem more than the 2nd rank teams. Awesome!
We will be releasing the editorials to all the problems soon and the list of teams selected to the finals will be released after the results of plagiarism tests are out.

Hello Everyone,

I would like to invite you to the mirror contest of official ACM-ICPC Asia-Kolkata Onsite regionals. The contest will start after one hour to the real contest at 11:00 hrs, IST tomorrow (sorry for the very short notice). There are some interesting sets of problems, hope you enjoy cracking them.

Please find details of the contest below:

• Contest link: https://www.codechef.com/KOL15MOS
• Start time and date: 11:00 hrs, IST
• Registration: This is a team contest, so you need to register your team here to take part in it.
• Note: Please login with your team handle to take make submissions to the problems in the contest.

See you all competing!

We gladly invite all the programmers around the world to take part in the " IPC ACM ICPC PREPARATORY SERIES "

Yes! There is Huge cash prize at stake!

This is a team contest (upto 3 participants in a team) of 5 hours each with ACM ICPC rules, organized on CodeChef. This is a unique series of 12 contests, where there is a separate cash prize for the problem setters as well. There are 9 problem setting teams consisting of around 7 problem setters each. Problem setting teams compete among themselves to make better problem sets.

Cash Prizes

For the final winners in rest of the world category:

• 1st Prize: $1000
• 2nd Prize: $500
• 3rd Prize: $200

For the final winners in Indian category.

• 1st Prize: INR 50,000
• 2nd Prize: INR 25,000
• 3rd Prize: INR 10,000

Eligibility Criteria

The IPC programming series, though aimed at ACM ICPC aspirants, is not limited to them. Anyone who wants to try their hand at the problems from some of the finest programming minds in India can do so. Yes! It is open to all the programming enthusiasts across the globe.

Registration

You can register for the contest at https://www.codechef.com/teams/register/IPC15P1A

To know more about what IPC is, and for further details about schedule, event format and rules, please visit https://www.codechef.com/ipc/2015

UPD1:

With a lot of twists and turns in the leaderboard, the first contest of the series has concluded with the team sequoia winning! Congratulations! The complete leaderboard is available here. The problems can be seen here. The editorials are available here.

UPD2:

The second contest of the series will be starting in less than 22 hours!

CodeChef invites you to participate in the July Cook-off 2015 at here.

Time: 21st July 2015 (21:30 hrs) to 22nd July 2015 (00:00 hrs). (Indian Standard Time — +5:30 GMT) — Check your Time zone.

Details: July Cook Off

Registration: Just need to have a CodeChef user id to participate.

New users please register here

- Problem Setter : devu (Devendra Agarwal)
- Problem Tester : adurysk (Surya Kiran)
- Editorialist: amitp08 (Amit Pandey)
- Russian Translator: CherryTree (Sergey Kulik)
- Mandarin Translator: gediiiiiii (Gedi Zheng)
- Contest Admin: PraveenDhinwa (Praveen Dhinwa)

It promises to deliver on an interesting set of algorithmic problems with something for all.
The contest is open for all and those, who are interested, are requested to have a CodeChef userid, in order to participate.

https://www.quora.com/Surya-Kiran/Posts/A-Dance-with-Mobius-Function

Are you up for the challenge?

24 Hours of Non-Stop Thrill! Insomnia 2015!

Programming and Algorithms Group, and SDSLabs of IIT Roorkee are jointly organizing their flagship programming competition, Insomnia.

Since its inception in 2009, Insomnia has been witnessing an increasingly huge international participation. Noticing participation from some of the leading names of competitive programming, PAG and SDSLabs have amped up the level of the competition from a 12 hour to a 24 hour contest.

This year's problem setters include members of 3Spades, Winner of ACM-ICPC Amritapuri Regional and previous ICPC World Finalists.

The contest will have about 20 odd problems and will last for 24 hours with varying difficulty. Contestants will be expected to submit working code in either C/C++ or Java.

It is a team contest with a maximum team size of 3. The contest will be held on our own personal grader Code Village.

The contest starts at 21:00(IST) on 21st March, 2015.

Update : The prize money of the contest is INR 20,000.

Update 2: The contest started!

Update 3: Coming into the last two hours of the contest, we see a fierce battle between the top teams of the leaderboard. Even though Yuhao Du is still leading with 17 solved problems, we have Team Believe at second followed by team confused, both with 16 accepted solutions! Team WontGiveItBack is right at their heels with 15 ACs! It is going to be interesting to see how this ends!

Update 4: So finally we have a winner! Having stayed on the top of the leaderboard right from the start of the contest, Yuhao Du from China has won Insomnia 2015! Kudos, man!

Believe from IIIT Hyderabad comes second, followed by Team confused from Jahangirnagar University, Bangladesh. Three different countries in the top-3! The campus winner is team WontGiveItBack. All the winners shall be contacted soon regarding their prize money.

You can check out the complete leaderboard at https://codevillage.sdslabs.co/user/view_rank/1/1000/30

The editorials will be sent to all the participants at the email ids which you used to register for the contest. Others can check our event page for updates. This year, Insomnia saw over 600 distinct users and about 3000 submissions. This is a huge increase from last year. We hope you liked the problem set. If you enjoyed the contest, please spare a moment and give us your feedback. This will help us improve for next year!

https://docs.google.com/forms/d/18UaLy7lcizLiDPwdt6xLNEbkaEITijGCnj8I0OYURQA/viewform?edit_requested=true

Update 5: Editorials of Insomnia 2015 are up, check them out here.

For further details and updates, check out our facebook event page

Programming and Algorithms Group and SDSLabs present Algophobia, the Programming Contest of Srishti, the annual festival of Hobbies Club, IIT Roorkee. Link : https://codevillage.sdslabs.co/ Timings : 2.00 PM IST, 15th March

Happy Coding!

Hi everyone, our team qualified for ACM ICPC world finals 2015. We qualified for WF in 2014 also but did very bad and are focusing on performing better this time. For that, many people advised us to concentrate more on geometry as they can be really tricky and can make quite a good difference in the ranklist.

Can someone post some geometry problems which involve hard concepts which can be useful for our practice? May it be previous year's icpc problems or good problems in some online judges or any good resources to learn hard geometry concepts like blogs or tutorials. Is there any place where we can find such problems?

Thanks in Advance!

INSOMNIA THE NOCTURNAL CODING CHALLENGE WITH PARTICIPATION PROGRAMMERS ACROSS THE GLOBE

The nocturnal coding challenge based on Algorithm Challenges.Insomnia witnesses participation of programmers across the globe in 12 hour contest.

To register visit: http://www.cognizance.org.in/registration.php To participate visit: http://insomnia.cognizance.org.in/

For further queries contact : Shagun Sodhani +91-9634429120

Programming & Algorithms Group and SDSLabs invite you to Algophobic, a 5 hour ACM ICPC style individual coding contest. The contest will take place on 7th March from 7pm to 12 am on codevillage.sdslabs.co

The contest is open for everyone!!