Dear CodeCheffers!
The very first contest of the year has concluded, and we have a tie for the first seven places!
ACRush again leads the pack with the other six top place winners with him. It was a very well deserved first place for all of them. We also have 2 Indians in the Top 10 this time, with balakrishnan_v being one of the top 7!
Congratulations to all of them: ACRush, balakrishnan_v, Fdg, gennady.korotkevich, mikhailOK, triplem, wcgbg
We have a surprise in the top 7 in the form of Fdg. For all those who have been trying hard into getting into the winners list and not succeeding until now, this contest has shown up a good example. Fdg has been active on CodeChef since quite some time now and for the first time he has broken into the top 10! Our heartiest congratulations to him and hope he keeps on improving from here. We are happy to have mikhailOK make a come back to our long contest in a grand way! An interesting fact to note, he also shared the top spot in the last long contest (AUG11) that he had participated.
Now time for appreciating the efforts of those who brought this exciting contest to you. The dish was cooked by our extremely talented problem setters and a very vigilant tester, in spite of this being his first time.We had quite a few first timers in the problem setting panel as well and what a great job they did.
Sergey Kulik, Tomaz Hocevar, Nikhil Garg, David Stolp, Anton Lunyov, Vitaliy Herasymiv prepared the problems while Hiroto Sekido sampled them before they were served to you. A big applause to all of them for this effort.
Now, let us glance through the statistics and before we move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 10 days | 500 | 8981 | 242 |
| Country | Total Participants | Average Score per User |
| IN | 284 | 0.67 |
| Rest of World | 216 | 1.83 |
We observe that the participation has slightly gone down from the last time. 
As always, we are keenly awaiting your feedback on the quality and the level of difficulty of the problems. We will be happy to do anything that can better your experience.
And now, without any further ado, let me announce the distinct winners for the contest:
India:
1. balakrishnan_v
2. rudradevbasak
3. suh_ash2008
4. sharatiitr
5. ashish.pant
6. imagin
7. dudechandan123
8. mukulgupta
9. manishmap2
10. vaibhavabhi
11. mng88
12. calc_saransh
13. mcsharma1990
14. javadecoder
15. yash_coder
16. shettynamit
17. xyler
18. architk
19. bsrkaditya
20. manan
Rest of the World:
1. ACRush
1. Fdg
1. gennady.korotkevich
1. mikhailOK
1. triplem
1. wcgbg
7. komiya
8. skorknure
9. evgentu
10. fmm
That is all from us for now. Congratulations to all, once again. 
If you haven’t yet checked out the editorials for this contest, you can do so here.
We’re running a 2.5-hour Cook-off on Sunday, 22nd of January. It begins at 2130 hrs (Indian Standard Time), so be there!
Cheers,
Team CodeChef.
Ladies and Gentlemen,
The December Long Contest for 2011 has concluded, and no prizes for guessing, we have a clear winner this time. Without any need of an introduction, Tiancheng Lou leads the pack for the second consecutive time. He has figured in the top 2 for seven times in this year and finishes the year on a high taking the top slot once again! It has also been a tremendous performance from Hirose from Japan, a first appearance in the top 10. Congratulations to both of them.
The Indian rank list has 16 contestants tied at the 7th position with many new faces in the top 20! For the first time Balajiganapathi has cracked the top 2 and in what a style! The second place deserves a special mention for being occupied by the relatively unknown but very promising Archit Karandikar from IIT Indore, closely followed by Anoop Chaurasiya. As with Balaji, this is their best performance till date on CodeChef and we hope that they only improve from here. Congratulations to both of them.
Needless to say all the excitement of the contest wouldn’t have been served had the dish not been cooked so well by our extremely talented problem setters and the very vigilant tester.
AnhDQ, Gennady Korotkevitch, Hiroto Sekido and Vamsi Kavala prepared the problems while the most reliable David Stolp sampled them before they were served to you.
The statistics and the final winners list follow:
Contest Statistics:
| Length of Contest | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 10 days | 564 | 8765 | 245 |
| Country | Total Participants | Average Score per User |
| IN | 374 | 0.55 |
| Rest of World | 190 | 1.35 |
Not withstanding the difficult problem set, the participation improved quite a bit from the last time. This is encouraging. We will still be glad to know from the community if there is anything that we can do to improve participation more. Please give us the feedback on the quality and level of difficulty of the problems.
And now, here are the distinct winners for the December contest:
India:
1. balajiganapath
2. architk
3. imagin
4. udayrocks2k8
5. anshulgoyal
6. svm11
7. ashish.pant
7. balakrishnan_v
7. bittu_it
7. crazysaikat
7. dudechandan123
7. gurpreet_09
7. javadecoder
7. Johar
7. mcsharma1990
7. mng88
7. mukulgupta
7. navinag
7. saurabhmodi102000
7. sharatiitr
7. vaibhavbahl
7. xyler
Rest of the World:
1. ACRush
2. hirosegolf
3. gawry
4. iscsi
5. binon
6. pasin30055
7. hiphip
8. shindo
9. ushsh
10. success
That is all for now. Congratulations to all, once again.
If you haven’t yet checked out the editorials for this contest, you can do so here. Do not forget to pester the problem setter with all your doubts there. Yes they will answer each one of your questions directly.
We’re running a 2.5-hour Cook-off on Sunday, the 18th of December. It begins at 2130 hrs, so be there!
Cheers,
Team CodeChef.
Greetings CodeCheffers,
The Challenge for September 2011 has concluded, and once again, there was no exclusive winner on the Indian side of things. On the global side, however, we saw a clean victory, of which we shall inform you in just a few lines.
Before moving on though, I’d like to mention that this month’s participation very nearly equalled the highest ever participation for a long contest; I am sincerely pleased to see so many people constructively using their free time.
Another unusual highlight was the single successful submission for the challenge problem TILT… what happened guys? The problem setter himself was surprised.
A massive under-10 tie saw the 9th rank cover nearly 140 people! Talk about neck-and-neck…
Now, for the honorary problem setters and tester, whom all of us here are deeply ingratiated to:
David Stolp, Gennady Korotkevitch, Saransh Bansal, Imran Sunny and Vamsi Kavala prepared the problems while Shilp Gupta sampled them before they were served to you.
Let’s look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 711 | 7845 | 447 |
| Country | Total Participants | Average Score per User |
| IN | 531 | 0.89 |
| Rest of World | 180 | 1.48 |
Winners list for the September 2011 Contest:
India:
01. Balakrishnan Varadarajan (winner of prize money Rs. 5000)
01. rudradevbasak (winner of prize money Rs. 5000)
01. Varun Jalan (winner of prize money Rs. 5000)
01. utkarsh lath (winner of prize money Rs. 5000)
05. mosquito
05. Pratik Tandel
05. sharatiitr
05. vivekitbhu
Global:
01. ACRush (winner of prize money $400)
02. ddr (winner of prize money $60)
02. hanshuai (winner of prize money $60)
02. lutyj (winner of prize money $60)
02. Oleg (winner of prize money $60)
02. s.max (winner of prize money $60)
07. Anton Lunyov
07. iscsi
07. Tony Liu
Congratulations to all, and a special mention to ACRush for being the only one to solve David Stolp’s TILT.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 18th September 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Adarsh Loyal.
Hi CodeCheffers,
The August Challenge 2011 is over!
The August contest has got quite a few winners at the top this time. It seems the winners are trying to prove a point that they want to be Number 1 and will not accept the 2nd spot this month 
. Anyways back to some stats, the Global rank saw 7 participants tied at 1st place and in the Indian winners, 3 people tied at 1st place.
Overall a good contest, a fair bit of difficulty this month with only 2 problems being easily solved.
Before we move on to the next section of the blog post, a special mention of the people who made this contest possible:
Vishal Anand, Ivan Mistreanu, Snigdha Chandan, Abdullah Mahmud and Anton Lunyov were the problem setters while Shilp Gupta was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 629 | 6873 | 364 |
| Country | Total Participants | Average Score per User |
| IN | 425 | 0.60 |
| Rest of World | 204 | 1.20 |
Winners list for the August 2011 Contest:
India:
01. Pratik Tandel (winner of prize money Rs. 6666)
01. rudradevbasak (winner of prize money Rs. 6666)
01. Varun Jalan (winner of prize money Rs. 6666)
04. suhash
05. Pradeep George Mathias
06. nikhil
07. gultus
08. calc_saransh
09. dudechandan123
10. NAMIT .D. SHETTY
11. vivekitbhu
12. prashantc29
13. jayesh02
14. Paresh Verma
15. Nilesh Hamane
16. mendax
17. deepangupta91
18. sanjay.iitg
19. bagrawal
20. theicebreaker
Global:
01. ACRush (winner of prize money $100)
01. gennady.korotkevich (winner of prize money $100)
01. meret (winner of prize money $100)
01. mikhailOK (winner of prize money $100)
01. Oleg (winner of prize money $100)
01. snapdragon (winner of prize money $100)
01. Tomasz Czajka (winner of prize money $100)
08. zhujiaye
09. qwaker00
10. wcwswswws
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 21th August 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The July Challenge 2011 is over!
The July Contest saw some big names battle it out at the top spots. We saw some last minute changes in Indian Ranking from Ravi Kiran who managed to bag the top spot from India and Tomek Czajka who bagged the Global spot. Overall a good contest, a fair bit of difficulty mixed with some easy problems gave this problem set a good balance.
Before we move on to the next section of the blog post, a special mention of the people who made this contest possible:
David Stolp, Ivan Mistreanu, Ashwin Jain, Ashar Fuadi and Gennady were the problem setters while Shilp Gupta was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 460 | 8189 | 327 |
| Country | Total Participants | Average Score per User |
| IN | 295 | 1.08 |
| Rest of World | 165 | 1.89 |
Winners list for the July 2011 Contest:
India:
01. Pratik Tandel (winner of prize money Rs. 12000)
02. Varun Jalan (winner of prize money Rs. 8000)
03. Prunthaban K
04. Archit Karandikar
05. sharatiitr
06. root5
07. flying_ant
08. mkagenius
09. jayesh02
10. deepangupta91
11. mukulgupta
12. sunny816.iitr
13. Praveen Kumar
14. vamsi_kavala
15. mendax
16. FrostByte
17. pikku
18. Amit Karmakar
Global:
01. Tomasz Czajka (winner of prize money $400)
02. hanshuai (winner of prize money $300)
03. chmel_tolstiy
04. Oleg
05. pperm
06. cgy4ever
07. s.max
08. tanzaku
09. xxjx
10. EgorK
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 24th July 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The June Challenge 2011 is over!
The June contest saw some interesting participation in the first couple of days. In the Indian rank list we have a tie for the 5th place between 4 people and 11th place between 14 people and in the Global list we have a tie for the 14th place between 7 people. During the contest we had faced an xss attack on our site due to which we had to bring the site down for a few hours and extended the contest by a day. We are fully functional now. You can read more about the attack here.
Before we move on to the next section of the blog post, a special mention of the people who made this contest possible:
David Stolp, Tomaz Hocevar, Ivan Mistreanu and Rahul Gulati were the problem setters while Shilp Gupta was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Visitors | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 653 | 9434 | 324 |
| Country | Total Participants | Average Score per User |
| IN | 450 | 0.62 |
| Rest of World | 203 | 1.67 |
Winners list for the June 2011 Contest:
India:
01. suhash (winner of prize money Rs. 12000)
02. Pulkit (winner of prize money Rs. 8000)
03. coders1122
04. Prunthaban K
05. Balakrishnan Varadarajan
05. Gagandeep Bhatia
05. Pradeep George Mathias
05. sushilnath
09. loonydmad
10. Gunjan Sharma
11. chakradarraju
11. deepangupta91
11. flying_ant
11. ??
11. kashyap_kumar
11. kaushik.mv
11. pikku
11. Surendra
11. root5
11. SIGSEV
11. smithinsu
11. sppraveen
11. theeporithirumugam
11. yash_coder
01. gennady.korotkevich (winner of prize money $400)
02. hanshuai (winner of prize money $300)
03. Oleg
04. dumbear
05. shindo
06. pasin30055
07. gerald
08. nileshdalvi
09. qwaker00
10. alexey_enkov
10. gt
10. dzhulgakov
10. EgorK
10. orfest
10. s.max
10. wywcgs
10. xfastx
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 19th June 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email tofeedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The May Challenge 2011 is over!
This month we saw a good distribution of difficulty levels across the problems, similar to last month the overall participation has been consistently increasing . We also saw some intense battle for the top spot between the top 10 global winners, eventually Liang Yaxiong from China bagged the top rank in his very first contest at CodeChef. Congratulating him and all the other winners for their participation.
Before we move on to the next section of the blog post, a special mention of the people who made this contest possible:
Zac Friggstad, AnhDQ, Anton Lunyov and Snigdha Chandan were the problem setters while David Stolp was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Visitors | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 10,571 | 608 | 8909 | 265 |
| Country | Total Participants | Average Score per User |
| IN | 410 | 0.51 |
| Rest of World | 198 | 1.51 |
Winners list for the May 2011 Contest:
India:
01. Balakrishnan Varadarajan (winner of prize money Rs. 12000)
02. arijit91 (winner of prize money Rs. 8000)
03. ishandutta2007
04. Balajiganapathi
04. coders1122
04. Gagandeep Bhatia
07. Gunjan Sharma
08. pikku
09. prashantb1984
10. calc_saransh
11. vamsi_kavala
12. vin_74
13. deepangupta91
14. codecrux
15. mcsharma1990
16. wacko_jacko
17. yak
18. yash_coder
19. javadecoder
20. dudechandan123
Global:
01. dumbear (winner of prize money $400)
02. Tomasz Czajka (winner of prize money $300)
03. hanshuai
04. skyfire
05. kohyatoh
06. gennady.korotkevich
07. Oleg
08. ACRush
09. al13n
10. EgorK
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 29th May 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The April Challenge 2011 is over!
The contest went through a few hick-ups this month, we faced downtime of our judge SPOJ for about 10 hours, due to some construction work which caused a network breakdown in Poland, thats where our judge is located. We therefore extended the contest by 24hours to make sure no one lost out during this downtime. We also had a few changes in our test cases during the contest and had to re-judge the problems L2GRAPH and RECTCNT.
Before we move on to the next section of the blog post, a special mention of the people who made this contest possible:
Zac Friggstad, AnhDQ and Snigdha Chandan were the problem setters while Rajiv Kumar was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Visitors | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 11 days | 15,858 | 714 | 14688 | 531 |
| Country | Total Participants | Average Score per User |
| IN | 506 | 1.14 |
| Rest of World | 208 | 2.31 |
Winners list for the April 2011 Contest:
India:
01. rudradevbasak (winner of prize money Rs. 12000)
02. utkarsh_lath (winner of prize money Rs. 8000)
03. balajiganapath
04. smithinsu
05. shadow
06. SIGSEV
07. yash_coder
08. sandygupta
09. tushar1391
10. pikku
11. Johar
12. mcsharma1990
13. magick968
14. jayesh02
15. Amit Karmakar
15. coders1122
15. hemant_baid
15. kaushik.mv
15. kaushik_iska
15. Paresh Verma
Global:
01. gennady.korotkevich (winner of prize money $400)
02. ACRush (winner of prize money $300)
03. pasin30055
04. skyfire
05. thocevar
06. laycurse
07. khaustov
08. EgorK
09. pperm
10. al13n
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 24th April 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The March Challenge 2011 is over and we are sorry for this delayed announcement.
The contest was marred in between and we faced a downtime for a period of more than 30 hours! The Judge we use on CodeChef is maintained in Poland. While the ISP, on which the Judge resides, was performing some maintenance work it was unfortunate that some backup cables were damaged, which caused the breakdown of the Judge servers. It was a rare occurrence that such major downtime was faced. The server team worked for all this while waiting for the electricity to be restored and get the Judge servers up and running as quickly as they can ensuring that no data was lost. We apologies for the inconvenience caused and also thank you for being patient with us and coming back to participate on the extended day.
Now the good news.
Before we announce the results, a special mention of the people who made it possible:
Zac Friggstad, Ivan Mistranu, Ashar Fuadi, AnhDQ, Tomaz Hocevar were the problem setters while David Stolp was the diligent tester of this month’s contest.
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Visitors | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 10 days | 25,922 | 384 | 7887 | 143 |
| Country | Total Participants | Average Score per User |
| IN | 138 | 0.57 |
| Rest of World | 246 | 0.66 |
Winners list for the March 2011 Contest:
India:
01. rudradevbasak (winner of prize money Rs. 12000)
02. utkarsh_lath (winner of prize money Rs. 8000)
03. phinfinity
04. balajiganapath
05. yellow_agony
06. shadow
07. razimantv
08. smithinsu
09. pratikmoona
10. Anuj Arora
11. imagin
12. codegambler
13. drakknight
13. flying_ant
13. gsbhatia
13. kaushik_iska
13. mcsharma1990
13. pikku
13. pulkit
13. rosyish
Global:
01. ACRush (winner of prize money $400)
02. mikhailOK (winner of prize money $300)
03. EgorK
04. pperm
05. Oleg
06. gmark
07. al13n
08. chavit
09. frost_nova
10. gawry
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 20th March 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
Hi CodeCheffers,
The February 2011 Challenge is now over.
A few quick facts about this contest:
01. We don’t remember the last time we had a tie at the top of the rank list. This time we have a tie on our global list for the 2nd rank between Ashutosh Mehra and Hiroto Sekido.
02. We also have an Indian coming 2nd on the Global list, the last time we saw an Indian up the list were in January and September 2010.
03. This month we have 6 Indians in the Global top 20 list.
04. From the International list we have Jan and Mark Gordon featuring for the first time on the Global top 20.
05. We had close to 16,400 page views for this contest.
A special mention about our Problem Setter and Tester for this months problems:
Zac Friggstad, Ivan Mistranu, Tanaeem, Anshuman Singh, Tomaz Hocevar, Duc and Subrahmanyam (tester)
Lets look at some Statistics and then move on to see the final winners list.
Contest Statistics:
| Length of Contest | Unique Visitors | Unique Participants | Total Number of Submissions | User who have solved at least one problem |
| 10 days | 16,398 | 426 | 8652 | 289 |
| Country | Total Participants | Average Score per User |
| IN | 276 | 0.51 |
| Rest of World | 113 | 1.70 |
Winners list for the February 2011 Contest:
India:
01. Ashutosh Mehra (winner of prize money Rs. 12000)
02. Yash (winner of prize money Rs. 8000)
03. Suhash
04. Ravi Kiran
05. Balajiganapathi
06. Abhijith Reddy D
07. Gunjan Sharma
08. Sunny Agrawal
09. Pratik Tandel
10. Anshul goyal
11. Mahesh Chandra Sharma
12. Sankalp Raghav
13. Divyanshu
13. Anil Kishore
13. Uday Jalan
13. Vikas
17. Vikram Kumar Gupta
18. Manish Kumar
19. Shivmitra Mishra
Global:
01. Tomek Czajka (winner of prize money $400)
02. Hiroto Sekido (winner of prize money $300)
03. David Stolp
04. Oleg
05. Vladislav Isenbaev
06. Balakrishnan Varadarajan
07. Jan
08. Burdakov Daniel
09. Mark Gordon
10. Darkgt
Congratulations to all.
If you haven’t yet checked out the editorials of the problems to this month’s contest please do so here.
We are running a 2.5 hours Cook-Off that is scheduled for 20th February 2011 at 21:30 IST
If there is anything that you would like to let us know then do comment on this blog post or send in an email to feedback@codechef.com
Cheers,
Harsh Munshaw
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