Hi Codeforces!

The Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) is going to be held on 05 Oct at 9:05 (UTC+2)! The round will be rated for everyone.

This round is organised in collaboration with 2nd Hello Barcelona ACM ICPC Bootcamp 2017 and supported by Sberbank, the biggest commercial and investment bank of Central and Eastern Europe, with over 175 years of history.

150 students from 53 universities, including ITMO, University of New South Wales, St. Petersburg State University, MIPT, Ural Federal University, Tomsk State University, Novosibirsk State University, Saratov State University, Samara National Research, Perm State University, and many other top global universities such as USA’s highest placing team, Central Florida University, along with Canada’s University of Waterloo, high-scoring Asian teams from Hangzhou Dianzi and Singapore, and Tokyo University, as well as Stockholm’s KTH, will be competing as individuals for the online round, which includes those of you from Codeforces!

The past week has been full of intense competitions, job interviews with Sberbank, and contest analysis and lectures by Andrey Stankevich (andrewzta), Mike Mirzayanov (MikeMirzayanov), Gleb Evstropov (GlebsHP), Artem Vasilyev (VArtem) and Mikhail Tikhomirov (Endagorion).

The event is completely international, as teams from all parts of the globe compete and practice side-by-side. They say a picture is worth a thousand words, so here is a selection to give you some idea of what’s happening at our boot camp.

Can't download http://assets.codeforces.com/photos/BAR2017/list.txt [tried twice].

And, once again, we can’t wait to see you all compete on the international stage, smoothing the road towards the April World Finals in Beijing.

The round’s creators are Endagorion, ifsmirnov, zemen and Arterm — team MIPT Jinotega, two-time medalist ACM-ICPC World Final (2016-17). The round is combined for both divisions, will contain seven problems and last for three hours.

Good luck!

Scoring: 250-500-1000-1500-2250-2500-3500

UPD: Thanks for participating, glory to the winners!

1. HYPERHYPERHYPERCUBELOVER
2. jqdai0815
3. ainta
4. zigui
5. fateice

We will publish the editorial as soon as the Barcelona Bootcamp activities conclude.

UPD2: the English editorial is here.

Hello everyone!

The second round of MemSQL Start[c]UP 3.0 will take place this Saturday, September 30, at 10:05am US/Pacific.

There will be an onsite round at MemSQL HQ and parallel online rounds that will be open for div1 and div2 participants. The online finalists (placed in top 500 in Round 1) will be given 100 MemSQL Start[c]UP T-shirts.

The onsite contestants will be participating from MemSQL HQ using their personal laptops. Breakfast will be served starting at 8:30 am, contest starts at 10:05 am and lunch will be served after the contest. The three winners of the onsite round will be awarded Amazon gift cards for $1000, $500 and $250. Please come early to set everything up.

Here is the list of people who agreed to participate: aandrew, al13n, ToTLeS, architkarandikar, Belonogov, BIT-silence, chenmark, farmersrice, Lewin, LiChenKoh, _M_, NgocHai, fmqjpt, Jatana, SaveVMK, scott_wu, sdya, SnapDragon, winger, Aviously, xiaowuc1, yum, yzyz.

If you haven't accepted the invitation yet or you think that we missed you, please message MikeMirzayanov or cerealguy.

We will update this post with more contest details later.

Good luck!

UPD: For onsite finalists: you are already registered for the corresponding round. You don't need to register anywhere else. For everybody else: choose the corresponding division round. All rounds will be rated for everybody, and we'll make special standings for the official participants of Round 2 (who placed in top 500 in Round 1).

UPD2: All online finalists will be registered in Div. 1 round automatically.

UPD3: Huge thanks to round testers: ashmelev, Errichto, cyand1317, vintage_Vlad_Makeev!

UPD4: You will be able to see results of offsite finalists using this link.

Congratulations to winners!

Onsite finalists:

1. scott_wu — $1000 Amazon gift card!
2. Belonogov — $500 Amazon gift card!
3. xiaowuc1 — $250 Amazon gift card!
4. LiChenKoh
5. sdya

Other finalists and div. 1:

1. tourist
2. Petr
3. ksun48
4. halyavin
5. Arterm

Div. 2:

1. laizenan
2. PSMao
3. lqs2015
4. Ahmed_Abdellah
5. kr_abhinav

Hello, Codeforces!

I'd like to invite you to Codeforces Round #436 (Div. 2). It'll be held on Monday, September 25 on 10:35 UTC and as usual Div. 1 participants can join out of competition. Note that round starts in the unusual time!

This round is held on the tasks of the school stage All-Russian Olympiad of Informatics 2017/2018 year in city Saratov. They were prepared by Perforator, MikeMirzayanov and fcspartakm. Many thanks to the testers: sdya и BledDest, and coordinators KAN and vintage_Vlad_Makeev.

It will be a little unusual round — you will be given six problems and two hours to solve them.

Good luck and have fun!

Congratulations to winners!

Div. 2:

1. zjt_ioi_2019_ak
2. AngusRitossa
3. Jha_The_ME_Coder
4. cxh007
5. Alexxx

Div. 1:

1. Shik
2. dreamoon_love_AA
3. black_horse2014
4. orbitingflea
5. KassiJulgus

Analysis is here.

Hello Codeforces,

Manthan, Codefest 17 will take place on Sunday 24th September, 2017 20:05 IST with a duration of 2.5 hours (tentative). The round is rated for both Div1 and Div2 participants and consists of 7 problems.

The Department of Computer Science and Engineering is conducting Codefest from 22nd-24th September. Manthan (मंथन in Hindi, meaning Brainstorming), the algorithmic programming contest under the banner of Codefest, is being held as a special Codeforces round. The round follows regular Codeforces rules.

The round is prepared by bharat.khanna.cse14, ayush24 and divyam.

We express our heartiest thanks to KAN and vintage_Vlad_Makeev for their help in preparing the contest and MikeMirzayanov for the awesome Codeforces and Polygon platforms!

Prizes:

Overall 1st place: INR 25,000 Overall 2nd place: INR 18,000 Overall 3rd place: INR 12,000

1st place in India: INR 10,000

1st place in IIT(BHU) Varanasi: INR 4,000 1st place in freshman year, IIT(BHU) Varanasi: INR 1,000

About Codefest: Codefest is the annual coding festival of the Department of Computer Science and Engineering, IIT (BHU) Varanasi, which is held online and is open to participation by all! Register on the Codefest website now! Total prizes worth ₹400,000/- up for grabs with events covering domains from Math, Machine Learning, Natural Language Processing and Capture The Flag style competitions. Go to the Codefest website to find out more!

UPD1: The scoring distribution is 500-1000-1500-2000-2500-3000-3500

UPD2: System testing has been completed. Following are the winners of the contest:

1. anta

2. jqdai0815

3. tourist

4. Shik

5. LHiC

Best in India:

rajat1603

UPD: The editorial for the first 4 problems has been posted. We will update the editorial of the rest 3 problems soon!

Hello Codeforces!

On September 21, 18:05 MSK Educational Codeforces Round 29 will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

The round will be unrated for all users and will be held on extented ACM ICPC rules. After the end of the contest you will have one day to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 7 problems and 2 hours to solve them.

The problems were prepared by Mikhail awoo Piklyaev, Mikhail MikeMirzayanov Mirzayanov, Vladimir vovuh Petrov and me.

Good luck to all participants!

Hello Codeforces!

I'm glad to announce that on Sep/19/2017 15:05 UTC Codeforces Round #435 for the second division will take place. As usual, First division participants can take part out of competition.

This round was prepared by me.

I'd like to thank mohammedehab2002 for writing the statements and the editorials and testing the round, Livace,Alladdin,300iq and cdkrot for testing the round, vintage_Vlad_Makeev for helping us in contest preparation, translating the statements into Russian and making one of the problems more interesting, KAN and Ahmad_Elsagheer for giving their opinions and thoughts about the problems and MikeMirzayanov for the great Codeforces and Polygon platforms.

You will be given 6 problems and 2 hours to solve them.

The scoring distribution will be announced later.

UPD. 500-1000-1500-1750-2000-2750

**UPD Congratulations to the winners:

Div1+Div2:

1-Shik

2-KassiJulgus

3-I_love_Tanya_Romanova

4-MrDindows

5-scanhex

Div2:

1-KassiJulgus

2-scanhex

3-qscqesze8

4-UpdateRatingOrRIOT

5-NickR

UPD editorial

Welcome to 2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest, qualification stage (Online Mirror, ACM-ICPC Rules, Teams Preferred).

The contest was held yesterday on September 17. Mostly it is focused on the participants of the Div 2.

Note that you can print PDF (English or Russian) with the statements. It will be available on the contest dashboard page on the right.

Good luck!

I apologize to the participants of the round. It happened that I accidentally had run improper script and it rebooted the judging machines. It is very insulting, because most problems were proposed by me and I hoped to host an interesting competition for you. A lot of effort was spent on preparation. Apparently, the mistake of just such a human character happened for the first time. I really hope not to repeat it in the future.

MikeMirzayanov

Want problems? We have some!

Codeforces Round 434 will start on September 17 (Sunday), 13:05 (UTC). It will be based on Technocup 2018 Elimination Round 1. So, if you are a Russian-speaking high-school student, please take part in the Technocup 2018.

Many thanks to KAN, vovuh, Neon, ifsmirnov, irkstepanov and WHITE2302 for their help in round preparation. Some problem ideas are mine.

I hope you will like problems. There will be 6 problems in div. 2 and 5 problems in div. 1.

Wish you good luck and bugless code.