The Chef would like to apologize for the delay in updating the March contests’ ratings. There had been some issues with the rating calculation code, and we wanted to fix them before updating the ratings. Ratings for all the four rated contests of this month: March Long Challenge, LunchTime and two external rated contests (CookOff was unrated) have been published.
There were two issues:
1. Due to an unintended consequence of a separate piece of code, users who were tied for the same rank in a contest, were being considered as being ranked one after the other by the rating algorithm.
2. The September Long Challenge of 2009 had a contest code which was different from what later became the norm: SEP09 instead of SEPT09. And due to this, this contest was missed during the rating calculation.
Both of these issues have been fixed, and a thorough code-review done. We are positive that there will be no such incidents in the future.
It was during SnackDown 2016 that we witnessed the finest programmers from across the globe competing on a single stage for the first time in India. We thoroughly enjoyed watching top school programmers take on the top university and professional programmers. There are many such moments during the previous editions that we cherish. And with all the fond memories in our kitty, we are super excited and eagerly looking forward to the 4th edition of SnackDown. The preparations are up, we began with the first steps for scouting and finalising the best possible dates for the competition. We did a couple of surveys within the community and we present the results below.
A sneak peak through the survey results.
The first survey was taken up by 654 players. Of those, 76.1% were available for the proposed day of online qualifying round (5th May to 7th may) while the rest voted out with primary reasons being end semester exams and summer internship.
Despite a majority percentage of players being available, we had to opt out of the proposed dates since quite a few people could not attend the qualifying round. Thereafter, we have brainstormed further about the dates and rolled out another survey with the new dates and an additional day for the online qualifier.
The second survey received responses from over 1200 players which was very heartening. Of those, 80.1% voted yes for the new dates (20th to 23rd May) while the rest did not. The percentage and participation was higher this time and hence we decided to go ahead with these dates. While this clashes with the ACM ICPC World final dates, we believe that it will be good fun for the finalist teams to take out a few hours to crack the qualifier.
After analyzing both the surveys we have finalized the schedule – Please go through it here:
Now it is time for you to gear up, form a team and prepare for the ultimate battle of brains.
Oh wait! We are yet to discuss the team formation rule that we had in our previous editions. If you are hearing this for the first time or forgot what it was, then you should head over to the following links here and here. Though our intent was to bring a matter of pride for the players to represent their institution/organization at an international level, we realized that there was very little acceptance from the community and that restriction wasn’t well received. After considering all the concerns raised by the community we decided that there would be “no restriction on team formation” in this edition. And finally, here we are presenting to you the CodeChef SnackDown 2017 in a truly open and a global avatar!
Keeping watching the space for more details and surprises about SnackDown 2017!
This is in a series of gifts that we are bringing in to give you as a part of our Birthday treat. After the new goodies, we are super excited to give you a brand new system to calculate the ratings on CodeChef, along with the new rating bands! We are also introducing the combined CodeChef Rating, which takes into account all the rated contests on our platform. Which also implies that we are bringing in more Rated Contests! Read on.
It was more than a year ago, that our then intern and now chef, Vishal Sharma teamed up with our beloved user and intern Surya Kiran to formulate the math behind the system. We took up the task of revamping the rating system because with time the present one started developing issues. Inflation of ratings was a major concern and this resulted in a wide difference in the ratings of users specially at the top, e.g., between rank 1 player and the rank 2 player. Fixing a rating band to reflect the skill of a player was also something that we wanted to incorporate.
The new rating system is a modification of the ELO, tailored for group contests. A very basic idea of how the ELO system works is this: Whenever you participate in a contest, you compete in a duel with all other participating users. Based on your existing rating and the other participating users’ rating, your probability of winning against each of them is calculated. Your actual performance is compared against this expected performance, and correspondingly, you gain or lose some points. The nitty-gritties of the system for the more mathematically inclined can be viewed here.
Some salient features of our new system are mentioned below:
The new combined CodeChef Rating: A major shift in our new rating system is the introduction of the combined CodeChef Rating, so as to have one single rating for the entire platform. This is in addition to the ratings calculated independently for the Long Challenge, the Cook-Off and the LunchTime contests. This combined rating is arrived at, by using the same algorithm for each contest that the user has participated in, in chronological order of participation without discriminating based on contest type. It is important to note that it is not computed by summing up the independently calculated ratings of the Long Challenge, the Cook-Off and the LunchTime contests. Doing this has the advantage that missing out on any one type of contests won’t affect your combined CodeChef Rating. You just end up losing the opportunity to increase your rating in the contests that you miss.
The new rating bands – Time and again, we kept receiving feedback for introducing rating bands. We took this opportunity to introduce this most wanted and a long awaited feature. We brainstormed on how best to represent this, and we zeroed in on two main, but opposing, factors: The coders should be comfortable with the representation, and this meant having colours as in most other platforms; and the other factor being accessibility to outsiders. We would love to see the sport of competitive programming gain traction, not just among participants, but also as a sport suitable for public following. We wanted outsiders to immediately understand how good a person was, and having only colours wouldn’t achieve that. We settled on introducing Stars, as they are universally recognized representations of skill. It also opens the doors for you to brag about your stars.
We present to you our various rating bands and their corresponding stars and colours:
<= 1399 : 1 Star 1 ★ 1400 - 1599 : 2 Stars 2 ★ 1600 - 1799 : 3 Stars 3 ★ 1800 - 1999 : 4 Stars 4 ★ 2000 - 2199 : 5 Stars 5 ★ 2200 - 2499 : 6 Stars 6 ★ >= 2500 : 7 Stars 7 ★
External Rated Contests: Currently, we have numerous contests organized by various colleges and organizations, and hosted on CodeChef. We will curate these contests, and the contests which we find to be good enough will count towards the CodeChef Rating. So, if you are conducting a programming contest for your college fest, this gives you an incentive to make it even better. You get the chance to get the best coders of the world to participate in your contest, as there will be CodeChef Rating points up for grabs! Get in touch with us if you want your contest to be rated.
A new combined Junior CodeChef Rating: For students of middle and high school, we have introduced a new combined Junior Rating system which will calculate the rating of all rated contests considering only the middle and high school students.
A brand new User Profile: We have revamped the existing user profile page to show your performance with swanky new graphs. Play around and we are sure you will love spending hours on it.
Important links: Head over to these pages to get an idea about the new ratings and rankings -
The distribution graph for the new CodeChef Ratings:
* Above is the current state of rating distribution as of 9th March 2017. Visit your profile to check your ratings.
The old ratings: We will keep the old ratings at the below given new URLs to refer your performance in the old system, in case you may have used that anywhere.
Penalties on Plagiarism: Users found cheating will be penalized heavily. The first time they are caught, their ratings will fall by 500 points. The second time, it will fall by 1000, and they will be banned on the third instance. This will be done from now on.
We are so very excited to bring this to you. We have worked very hard to do so. Since the change is big and spread over the entire website, there may be mistakes. We would like you tell us any issues that you find and do send us your feedback.
Want some quick advice? Try defeating higher rated coders for better raise :p
Birthdays are about sweets, cake, balloons, and lots of fun with your friends. Add presents to that list and suddenly the whole day gets brighter. Make them gifts a surprise and it’s tough to contain the excitement. So, we thought we would include all of that in our month long birthday celebration, for our 8th anniversary.
We started with a cool and calm celebration by devouring cake and pizza with our ever-hungry team members. But as stated, that was just a start. We have planned a whole lot more for you and us all. Some cool new developments on the website, some new developments for you, some new prizes, some new categories, and some surprises which will unveil themselves when the time is right. So, should we get the celebration started? We think we should.
When we say “nothing excites us more than new stuff,” we think we speak for us all. We thought we will introduce some “new goodies” to our collection and offer you an even wider range to redeem your laddus.
So, what are these new goodies that we speak of, you ask? Well, let us list them down for ya.
Head over to https://goodies.codechef.com/ and check out the latest additions to our goodies list in detail.
New Prize Categories:
It’s another “new” for you all. In our attempt to encourage programming talent from a wider pool, we have introduced some new prize categories on top of our existing ones. So now, we will see a lot of new programmers getting their hands on CodeChef goodies for the first time, some even multiple times. Now, let us introduce you to the new categories.
Random Laddus: Every rated contest, 5 participants will be randomly selected, and they will get 200 Laddus.
100% attendance participation reward: If a user participates (ie. solves at least 1 problem; and even partial solutions are counted) in each of CodeChef’s monthly contests (Long Challenge, CookOff, Lunchtime) in any 12 month period, then they will get 1000 Laddus. That is, if at any point, a user has participated in the last 36 CodeChef Monthly contests (ie. all the three contests in each of the last 12 months), then they will get 1000 Laddus.
Contests before March 2017 will not be counted. Once the prize has been claimed, the counter will be reset.
So mark your calendars!
First one to solve each of the problems individually: In each rated contest, the first person to solve each problem (100%) will get 100 Laddus.
Tiebreaker problems are excluded.
If there are at least 100 (and < 200) participants from a particular country (excluding India), then the top 20 from that country will get 40 Laddus.
If there are at least 200 participants from a particular country (excluding India), then the top 30 from that country will get 50 Laddus.
If there are at least 20 (and < 30 ) participants from a particular country (excluding India) who finish in the top 300 in the Global Ranklist, then the top 10 from that country will get 250 Laddus.
If there are at least 30 participants from a particular country (excluding India) who finish in the top 300 in the Global Ranklist, then the top 10 from that country will get 300 Laddus.
So go get all of your friends to participate and enjoy the rewards together!
Note: A user can get Laddus from at most one of the above two events.
The streak will be reset once the prize is claimed.
Note: Users who have been caught cheating will lose 50% of their Laddus, or 500 Laddus, whichever is higher.
So, is that it for the celebration?
Well, not exactly. We have just started. We have a huge star-studded colorful present waiting for you just around the corner. So, keep watching this space and be the first one to get your hands on your presents as and when they are unwrapped.
With that, we will put our party hat back on and head over to where the celebration is: our contests. You too join us there and have fun.
“CodeChef’s turned 8 and we think that’s great! So join us and celebrate!!” – Team CodeChef
Alright, that was our attempt at writing a poem and creating a catchy party invitation for our 8th anniversary.
How did we do?
Yeah, we were of the same opinion, but that’s how far our creativity with the words went. But that’s Ok, as long as you are joining us for the celebrations. You will, right? So, let’s blow the celebratory bugle, put on the party hats, and sing “Happy Birthday CodeChef” on top of our voice.
Happy Birthday, CodeChef!
With every anniversary, our love and belief for what we do grow from strength to strength. And we have no one but you to thank it for. It’s your constant affection and support that empower our beliefs and drives us forward. Hence, the cake is as much yours as it is ours. So, put on your funky outfits, party hats, and join us for the cake and the party.
Now as we sit down moving aside the balloons on the floor, with our plates overloaded with cakes and chocolates, let us take a walk down the memory lane and introspect the year gone by. But before we do that, we have to express our gratitude towards so many heroes without whom none of it would have been possible. Some familiar and famous, some working behind the scenes, all of these individuals have made the 8 fruitful years of CodeChef possible.
First and foremost, it’s all you wonderful people. Every single one of you. We thank you for your feedback, suggestions, participation, and even for the eventual banter, for it all keeps us going. So, thank you.
Our ministry of magicians featuring our problem setters, testers, editorialists, and the translators. It’s your spell that makes programmers of all ages and from all walks of life fall in love with us.
The ever reliable and meticulous team at SPOJ. Your engine powers our jet.
The avid users of our discussion forum, who’s there for everyone. Be it a newbie finding her steps in the world of programming or a pro finding it hard to locate that “;” the members of the programming community, have lent their hand to all.
The team of engineers and staff at Directi, for keeping CodeChef up and running 365×24×7.
And finally, the CodeChef team members, former and current, new and old, our interns, for their efforts towards taking CodeChef to greater heights.
All of the aforementioned individuals can be accounted for all the amazing feats we achieved last year and will achieve in the year to come in one way or the other. And what better way to celebrate their contribution than sharing the fruit of their hard work with you all. So, here are some figures from last year, which we think are the perfect reflection of the year we had here in CodeChef’s kitchen.
* All the data mentioned above is from March 2012 – February 2017
We love our numbers. No matter how many times we look at them, they just make us smile.
Now, to keep that smile going, let’s have a quick look at what all we at CodeChef did in the last one year, other than playing a prank on team members and fighting over pizza toppings.
SnackDown 2016 – In our attempt to make SnackDown a truly global competition, for its 2016 edition, we flew down the global participants for the onsite competition. We were privileged to watch some of the most decorated and celebrated names from the programming community live in action, under one roof, and for the first time in India. We were like a kid in a candy store. Let’s relive some of those moments again.
Post SnackDown 2016, in association with Indian Programming Community we conducted a three-day Indian Programming camp for the ACM ICPC aspirants in India. It was a one of its kind advanced camp featuring sessions will be delivered by some of the most eminent names from the programming fraternity including the likes of Sergey Kulik, Kevin Charles Atienza, and the senior members/mentors of the Indian Programming Community.
With SnackDown, we also revamped our homepage and gave our kitchen a tad makeover. It was long pending, and we finally did it. There were few other changes to go with it and if you have not discovered them yet, you can read all about them now.
https://goodies.codechef.com/ – The year 2016 got sweeter for us with the launch of our very own sweet shop. Ok, not sweet shop per se, but our goodies store. We had a lot of fun creating it and tried to have a bit more with the launch, and we think you enjoyed it too. Remember “the duck, the cube, and the ball”?
In the latter half of the year, we hosted the ACM-ICPC India Regionals, Online Preliminary Round 2016 for all four ACM ICPC India regionals, making it one of the biggest online contest hoster by us with over 6K users joining in at once. Following the success of online round we also went ahead and hosted the onsite round for 4 of the 5 ACM ICPC India regionals.
We also hosted the Indian National Olympiad in Informatics, 2017 (INOI-2017). The contest saw participation from over 300 school users from schools all over India.
Furthermore, the last year was particularly good for our shorter contest formats as we strengthened our stability and were able to successfully host two of the biggest online contests in SnackDown 2016 and ACM-ICPC India Regionals, Online Preliminary Round 2016.
These are just some of the many features and things that kept us occupied all through the year. There are plenty more in the pipeline.You can expect some new developments and some new announcements all through the month of March, as we continue our anniversary celebration. So, keep watching this space and our social media stream for some really exciting announcements and launches coming your way soon.
That will be all from us for this 8th-anniversary blog, send in your birthday greetings and messages for us on our social stream with #HappyBirthdayCodeChef and we will feature the best ones on our social stream and you will stand a chance to bag some “laddus” from the chef. So, be quirky, be creative, and be funny with your messages, and send in your love for the chef.
Now, without further ado, let’s get the party started. We’ll ask the DJ to drop the beat; you put on your dancing shoes and make some noise.
The course of February LunchTime 2017 was the final one for the month of February, which already had brought us so much action. And we were hoping for a cool and calm end to it. Set by Kamil Debowski, the February LunchTime 2017 brought exactly that for us. Other than the minuscule 5-minute delay to the contest, there wasn’t much to complain about the contest. And that’s not just us; even the participants were of the same opinion.
The LunchTime, though, is aimed at school students, but it is open to everyone to participate. And that’s why one of the biggest highlights of February LunchTime 2017 was to see petr join in the contest in the very early stage. Knowingly or unknowingly, as he later clarified over twitter, we were all just excited to see him make an appearance in our monthly contest. It’s the little things like this that makes our day and contests all so much fun.
Now, for more highlights from the contest, let’s move towards the rank list for the contest.
We start with the ROW school 10:
Now, the Indian school top 10:
Heartiest congratulations to all our winners. Let’s move towards the editorials section.
That will be all from us from this long-delayed February LunchTime tale we now enter the summers & examination season with March. And with tales from all three of our March contests, we will come back soon.
Till then, keep coding.
The shortest month of the year, February passes by so quickly that before you know it, you are staring at the busy exam season approaching towards you with March. With everyone busy putting the final touches to their final exam preparations, the seriousness in the air is rather evident. Any little break or source of entertainment is highly anticipated. And that’s what our February Challenge 2017 offered the programming enthusiasts buried deep into the books brushing up on their final lessons. But even it had its own fair share of calamities, to trouble the participants and to us. So, let’s have a closer look at the February Challenge 2017 in this delayed and curtailed tale from the contest.
Spread over the Valentine’s week, the February Challenge 2017 did not have the perfect start with a plethora of WAs dominating the maximum real estate on the rank table. There were sightings of green ticks as well, but a tad less prominent than some of the other contests we have seen. Interestingly, the problems attempted in the opening hours of the contest were spread all over the difficulty spectrum of the contest, with CHEFBEST being the one to see maximum submissions in the earlier stages of the contest. Among the other early favorites were KBIGNUMB, SEAINVS, MAKETRI, and CHEFAPAR. To have received submissions on 5 different problems in the first half an hour of the contest was something that we had not seen too often here at CodeChef, so we were quite excited about the prospect of the contest and where it will go. And that set us all nicely for the coming ten days of the contest.
We started the contest with 7 problems in the offering, all of which were accepted gracefully by the participants, with CHEFAPAR getting the maximum love. Despite the scattered submissions all over the problems, the contest had a rather smooth start with participants enjoying the problems to the fullest. Things were going smoothly on the rank table as well, with the battle to the top getting fiery with every passing day. However, all that calmness was marred by a glitch in the problems KBIGNUMB & CHEFBEST, both of which were removed from the contest almost midway. Now, since a number of participants were affected by the said glitch, precautionary measures were taken to make up for the loss.
We added two new problems to replace the marred two, and the contest was further extended by 6 days to make up for lost time of the users. As a result, we were at the receiving end of participants’ angst. However, things were got restored in the second of the contest as enough time added time made up for the loss of the participants. And with that, once again the battle to the top was on. It was the comparatively beginner jobasha and the seasoned campaigners ceilks, skyfire, and sokian. It was nice to see jobasha presenting a strong fight to his opponents in his very second contest. And now to see how every fared in the contest let’s have a closer look at the rank table and meet our winners.
We start with the women:
The global top 10:
Now, the Indian top 20:
ROW top 5 school students:
Indian top 5 school students:
Now for the special achiever’s category, we move to the highest scorers of the challenge problem outside the winners.
First, the ROW top 3:
Now, the Indian top 3:
Heartiest congratulations to all our wonderful participants, we hope you enjoyed the extended February Challenge 2017, despite the minor glitches at the beginning.
Problems with February Challenge 2017 didn’t end with the end of the contest, we also took a blow on our editorials. Due to some unavoidable reasons, we have not been able to upload the editorials for the contest even now. We deeply regret the delay and assure you that the delay has not been for no reason and we will be uploading them soon.
With that, we would like to take your leave as we move towards the other pending posts from our February and March contests. We will pen them down soon and will come back with some more interesting stories from our contests.
Till then, keep coding and do share your thoughts, feedback, or suggestions on our contests.
See you at the contests.
With a New Year, come many things “New.” You have aspirations, expectations, and resolutions for the year ahead. Determined and focused you are ready to take on the world. It goes for the programming fanatics as well. For programmers looking to solidify their strengths and make a mark on the programming world, it was the beginning of a fresh programming calendar packed with many exciting programming contests to take part in and win. The first in line was our January Challenge 2017, set on the first Friday of 2017.
While the aspiring participants waited for the contest to start, we gave them a little New Year surprise, to sweeten the start of the year for them. However, like all sweet things, they were required to work a tad harder for their sweet. And they did work for it. How well, though, we will find out in this look back at the first long challenge of the year.
The January Challenge 2017 was coming on close heels of the busy ACM ICPC 2016 – 2017 India regionals. We along with many other ACM ICPC aspirants and some members of our problem setting panel were on the constant move to different regionals across India. And after experiencing the live action at the onsite contests, it was time to experience the same with global participants online.
The course for January Challenge 2017 came from Maksym Bevza, Praveen Dhinwa, Misha Chorniy, Vaibhav Tulsyan, Sidhant Bansal Sergey Nagin, Kevin Atienza, and Satyaki Upadhyay in company with the Istvan Nagi, making a comeback in the role of tester. Alongside them were our translators in Sergey Kulik (Russian), Team VNOI (Vietnamese) & Hu Zecong (Mandarin) and our editorialist Vaibhav Tulsyan. We thank them all for their efforts that they put all through the holiday season to get the contest ready. Like always, with them by our side, we were expectant of a great contest. And even though, not all the problems were served at ones, the participants seemed to enjoy all of them as and when they were served during the course of the contest.
The first AC submission of the year 2017 in our monthly contests came from poikniok on CAPIMOVE, who took 13 minutes to get past the problem, the first in the contest was by slowrunner on CHEFCIRC, but it was a WA. And with that, the tone was set for the contest. As most of the early joiners went for CAPIMOVE, which was the first to be solved, there were few others who went for CHEFCIRC and CATSDOGS, but not many got the result they were looking for. The aforementioned three problems gave a smooth start to many users’ first challenge of the year, while for very few it became a source of frustration too. But that’s how the nature of every programming contest is, you win some, you lose some.
We won’t put it on the New Years Eve hangover, but the slow flow of the submissions into the contest gave it away that not many had put their party hats back in the closet. The first 50 submissions into the contest took 40 minutes. The next 50 took another 40. So, in the first hour of the contest, we barely received a tad over 100 submissions, but that didn’t ring any alarms as we were expecting it to be a slow start for the contest and are sure of it to pick up pace as the contest progresses. And that’s exactly what happened.
The contest started with 4 problems to start with and the early birds seemed to be enjoying them, with Capital Movement, Reservior, and Cats and Dogs being the early favorites. As we moved into the contest, the submissions started spreading onto the other problems as well. And with that, the race to the top was on as well. While the submissions table kept getting populated with submissions of different result code, the rank table was still missing some of its familiar names. But the January Challenge 2017 perhaps was not for the familiar names after all. Yes, there were few in ceilks, ccz181078, hellkitsune, rajat1603, skyfire and others, but it wasn’t about them, this time.
The January Challenge 2017 belonged to the comparatively new and unfamiliar names. If truth be told, 4 out of the top 5 names on the rank table are adolescents on CodeChef, with 5 or less contests under their belt. However, that did not have any impact on their performance and approach towards the contest. jobasha, mirosuaf, and swm_sxt seemed unmoved by the reputations of the names accompanying them on the rank table and kept going calmly about their business. And even though they were eventually triumphed by ceilks and ccz181078 for the first two slots, they did secure positions in the top five of the first Long Contest of the year.
And now, let us meet all the names featuring on the rank table:
We start with the women:
The ROW top 10:
The Indian top 20:
The Indian top 5 school students:
The ROW top 5 school students:
Now, for the special achievers, we head towards the top Challenge Problem solvers.
First the top 3 from ROW, other than the winners:
Now, the Indian top 3:
Give it up for all our winners!
We hope you all enjoyed the contest and its content all through the ten days of the contest. However, if you faced even the slightest of problems, we have the editorials for all the problems waiting for you. So, head over to the link below and munch on the editorials for January Challenge 2017.
With that, it’s safe to say that the January Challenge 2017 announced the arrival of many promising names on the rank table and we look forward to getting many such promising performances from them in coming years. Who impressed you the most or who are you looking forward to in the year ahead, do let us know in the comment section? Also, if your favorites are not on the rank table, do let us know of that as well and we will keep a close eye on them.
Now, it’s time to say goodbye and move towards the shorter format of our contests in January Cook-Off 2017 and January LunchTime 2017. We will come back soon with their stories.
Till next time, bye.
See you at the contests!
When you have a big day tomorrow, you tend to calm down, relax, and just prepare your mind for it. It holds true for many big sportsperson, many big movie stars, and pretty much everyone, except for programmers. Programmers are the most restless creatures on the night before. And after being with, knowing, and interacting with so many programmers over the years, we certainly can assert that. It was not different the night before the first ACM ICPC 2016 India regional was scheduled to take place at Hindustan University. Knowing that most of the top programmers in the country will either be travelling for the onsite event, or will be relaxing at home to compete in the coming ones, we thought it’s an ideal situation for a newcomer to rise and shine. And we could not have been far from the truth.
That he is talented and perhaps an emerging legend in the Indian programming world is something we have been hearing about rajat1603. Time and again, he even has proved it in various competitions. From being among the top school teams to come for the SnackDown 2015 Onsite to being one of the few school students to have secured a place in top 5 in our Cook-Offs, he has proven his mettle time and again. And the December Cook-Off 2016 was yet another display of his sheer brilliance. This time though, the setup had changed a tad.
He no longer is a school student, he was competing in his very first ACM ICPC Regional, and just like himself, his counterparts in uwi, yenthanh132, biginnnner, and many others had evolved too. And considering all that, we thought a night before his first ACM ICPC regional he might want to catch a breather and focus his energy on the big day tomorrow. He, on the other hand, had totally different plans. The December Cook-Off 2016 started sharply at 09:30 pm on 18th December 2016 and in the very first minute, CHEFSETC was cracked by, you guessed it, rajat1603. One minute is all it took him to crack the first problem of our Cook-Off. If that doesn’t send strong signals to your counterparts, we don’t know what does. And with that, it was on.
Contrary to the blistering start from Rajat, uwi had a slippery start when he got TLE in his first submission on CHEFINS. However, he was quick to recover and bagged his first AC inside the first 8 minutes of the contest as he cracked CHEFSETC. If truth be told, CHEFSETC was almost solved by everyone who attempted it. Off the first 100 submissions into the contest, 98 were on CHEFSETC, and that made it obvious that it was the easiest problem in the contest. However, getting the easy problem quickly doesn’t win you the Cook-Off. So, it was better for the participants to move on to the other problems as soon as they can, and they did.
Rajat grabbed his second in CHEFARRB in the 8th minute of the contest, while uwi took further 10 minutes to crack the same. By this time, the competition was nicely balanced. But then, uwi decided to revisit CHEFINS, however, nothing changed this time as well, TLE is what he got this time as well. By this time, Rajat had already cracked CHEFNUMK and got a significant lead over uwi. With 3 problems to his name inside the first 45 minutes of the contest, Rajat seemed comfortably cruising to the top. However, CHEFINS was not easy for him either. It took him more than half an hour to get it right. That’s pretty much the time he needed to crack the first three problems of the contest. But once he got that, with no penalty to his name, it pretty much sealed the deal for him. And a top slot for him into the contest was almost assured, however, there still was a problem unsolved, yet no one had attempted it and with uwi struggling CHEFINS it was highly unlikely that he was going to attempt that one. So we sat back and waited for the final bell to ring and find out whether 4 out of 4 ACs can get Rajat a Cook-Off win, and turns out they could.
With that Rajat had sent a strong signal to all his counterparts competing with him at the ACM ICPC regionals. And he didn’t disappoint at the regionals either. If you were following our ACM ICPC live coverage, you would know what we are talking about. For now, let us quickly take you to the rank table for December Cook-Off 2016 and see who stood where.
We start with the Global top 10:
Now, the Indian top 10:
Let’s give it up for all our winners and for all you wonderful people on your performances in the contest.
The fifth problem from COOK77 i.e. CHEFTRI4 remained solved during the contest, which makes the editorials of the contest even more important. So, if you are still wondering around CHEFTRI4, check out the editorials for the contest below and get over it.
And that completes the tale of the December Cook-Off 2016. We hope you enjoyed the contest and its tale. If you have any interesting insight, story, or any event that made COOK77 memorable for you, kindly do share it with us.
With that, there remains only 1 final story from our contests in the year 2016, that is the December LunchTime 2016 and we will publish that too very soon. Till then, keep watching this space, keep sharing the stories you like and do let us know what you think of our contests and their stories.
That will be all for now from everyone here at CodeChef.
Till next time, adios.
December is a busy month for every programmer around the world, for it is the ACM ICPC season. The regionals take place across the globe and the crème de la crème of the programming world battle it out to secure a coveted place at the ACM ICPC World Finals. It was no different this year as well. As we stepped into December, some of the regionals across the world had just concluded and we were just weeks away from the ACM ICPC Indian regionals.
With everyone looking for means to put the finishing touches to their ACM ICPC preparations, our December Challenge 2016, was their final big chance to test the waters, before they move towards the final frontier. While, for everyone else, it was the final chance to spend some time with their beloved computers and keyboards, before they step into the festive season and treat themselves with the sugary goodness that every festive season brings with it. It was an interesting setup. So, let’s see how the December Challenge 2016 fared.
The start to the contest was akin to pretty much like any other long contest we have had all through the year. It took saurabhrathi12 only 6 minutes to get the first AC of the contest on ANKTRAIN; it was followed by a couple of more ACs on the same problem. The second problem that saw an AC was SEAINCR, soon after ANKTRAIN. It remained like this for quite some time. The number of participation kept going up in the first half of the contest, while it stagnated in the latter half. And that is when the positions on the rank tables get decided. And it was an interesting looking rank table this time around. And we will tell you why.
When in the final days of the contest, the rank tables are generally occupied by the favorites. It was no different this time, the likes of sumeet_varma, rajat1603, mugurelionut, notimesea and many others still shining brightly on the rank tables. However, what was striking this time was the number of consistent performers, occupying the top slots. It’s one of those moments when you see your hard-work finally paying off. And the feeling certainly cannot be described in words. To see the likes of gvaibhav21, jtnydv25, ccz181078, come through the ranks and stamp their authority on the top slots of the rank table.
It was not easy to reach there and it certainly was not going to easy to stay there, especially when the seasoned campaigners have you in their sight. Every submission made now will decide their fate and position into the contest. But it seems that after years of wondering through the rank tables, they had mastered the art of defending their position on the rank table. So, as the fabulists would have it, it was a contest when persistence and grit won over experience. And now, we take a quick tour of the rank tables to meet all the winners from December Challenge 2016.
We start with the girls *Big round of applause*:
Now, on to the ROW top 10:
Now, the Indian top 20:
Now, let us move towards the schools to meet the young geniuses:
We start with the ROW top 5 from schools:
Now, the Indian top 5 from schools:
Now, for the special achievers, the top three scorers of the challenge problem, outside the winners:
First, the ROW top 3:
And finally, the Indian top 3:
Kudos to everyone on their brilliant performance in the contest!
With that, there are two more stories to tell from the month of December, which we will be updating pretty soon. We hope you had a wonderful 2016 and will have an even better 2017. And on that note, we would like to draw curtains on this delayed tale of December Challenge 2016. We hope you enjoyed the tale as much as you enjoyed the contest. If you have any feedback or words to say about the contest, the post, or CodeChef in general, you can always write to us at: firstname.lastname@example.org
Till next time, take care.