PikMike's blog

By PikMike, history, 3 days ago, In English,

1065A - Vasya and Chocolate

Tutorial
Solution (Ajosteen)

1065B - Vasya and Isolated Vertices

Tutorial
Solution (Ajosteen)

1065C - Make It Equal

Tutorial
Solution (Ajosteen)

1065D - Three Pieces

Tutorial
Solution (PikMike)

1065E - Side Transmutations

Tutorial
Solution (PikMike)

1065F - Up and Down the Tree

Tutorial
Solution (adedalic)

1065G - Fibonacci Suffix

Tutorial
Solution (BledDest)

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By PikMike, 5 days ago, translation, In English,
 
 
 
 
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By PikMike, history, 4 weeks ago, translation, In English,

On Sep/20/2018 17:45 (Moscow time) Educational Codeforces Round 51 (Rated for Div. 2) 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours 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 invented and prepared by Roman Ajosteen Glazov, Ivan BledDest Androsov and me.

Good luck to all participants!

Our friends at Harbour.Space also have a message for you:

Harbour.Space University is proud to announce new partnerships for this year’s Hello Barcelona Programming Bootcamp — VTB and Indeed Tokyo, with the addition of team sponsors Phaze Ventures and Spark Labs.

VTB, the largest international bank based in Eastern Europe, continues to be an official partner of our Hello Programming Bootcamp series, adding further quality to the 3rd edition of the Hello Barcelona Programming Bootcamp by bringing their own participants, as well as by supporting top teams from around the world.

Indeed Tokyo is Japan’s branch of the #1 employment website in the world, giving job seekers free access to millions of jobs from thousands of company websites and job boards. As they sponsor for the second year in a row, Indeed continues to offer the best job opportunities to the boot camp participants as they gather in Barcelona from September 26 to October 4, 2018.

UPD: There was a bug in testset and validator for problem F, we are currently fixing the issue. The statement included the correct resrictions. We will rejudge all the solutions as soon as possible. The round can become unrated, we are discussing this at the moment.

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 kmjp 6 210
2 MrDindows 6 223
3 elykuil 6 242
4 Nisiyama_Suzune 6 274
5 Fekete 6 274

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 299:-14
2 Laggy 100:-10
3 greencis 29:-2
4 Volkov_Ivan 19
5 dorijanlendvaj 13
694 successful hacks and 497 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A traxexeuler 0:03
B answhldkd 0:02
C ainta 0:06
D greencis 0:07
E tfg 0:38
F baggins 0:26
G yasugongshang 0:56

UPD2: We investigated the issue to get the following results. 10 people were noticeably affected (that took them more than 3 minutes of the working time). Round will surely be rated for other participants. As for the affected participants, we will look into the rating changes and revert them in case they are negative (set the participant into the unofficial participation mode).

UPD3: Editorial is out

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By PikMike, history, 5 weeks ago, translation, In English,

1036A - Function Height

Tutorial
Solution (Vovuh)

1036B - Diagonal Walking v.2

Tutorial
Solution (Vovuh)

1036C - Classy Numbers

Tutorial
Solution with combinatorics (PikMike)
Solution with precalc (PikMike)

1036D - Vasya and Arrays

Tutorial
Solution (Ajosteen)

1036E - Covered Points

Tutorial
Solution (PikMike)

1036F - Relatively Prime Powers

Tutorial
Solution (PikMike)

1036G - Sources and Sinks

Tutorial
Solution (BledDest)

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By PikMike, history, 6 weeks ago, translation, In English,

On Sep/07/2018 17:35 (Moscow time) Educational Codeforces Round 50 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours 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 invented and prepared by Vladimir Vovuh Petrov, Roman Ajosteen Glazov, Ivan BledDest Androsov, Maxim Ne0n25 Mescheryakov and me.

Good luck to all participants!

Our friends at Harbour.Space also have a message for you:

Hi Codeforces!

We are excited to announce our Work & Study Programme, geared towards diving into the worlds of Computer Science, Data Science, and Robotics, while kick starting a fulfilling paid internship with one of our industrial partners!

Required Education:

Degree in Robotics or Computer, Electrical, Mechanical Engineering or related disciplines

Qualifications and skills:

  • Hands-on robotic programming
  • Ideally experience within the automotive manufacturing sector
  • Knowledge understanding of robot control interface with ancillary equipment
  • Use of robot simulation packages
  • Deep experience with all things robotic, from infrastructure-free autonomy, to ROS, computer vision, and machine learning
  • Experience working with robot parts and components, developing robotics devices
  • Ability to concurrently manage multiple diverse and often complex issues and / or projects at the nexus of software, sensors, and hardware

If you are interested in this opportunity, APPLY HERE!

Should you be selected, we will invite you to a series of interviews with admissions, and our industrial partners.

Our programmes are both fundamental and practical. Upon joining, you start working with professionals from admired technology, design and communications companies. You will have strong technical and academic support, alongside industrial experience. This is a unique opportunity to benefit from both worlds of education and industry, in one of the most innovative cities Western Europe has to offer.

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 eddy1021 7 298
2 bmerry 7 301
3 LYJabc 7 547
4 thjchph4trjnh 7 551
5 BigBag 6 192

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 240:-18
2 greencis 47:-3
3 vinuthegr8 15
4 antguz 14
5 cubercsl 14:-9
497 successful hacks and 440 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A xiaowuc1 0:01
B TOSHINO_KYOKO 0:06
C cb_Adam 0:07
D BoolX 0:08
E bmerry 0:24
F rkm0959 0:10
G apink 0:28

UPD: Editorial is uploaded

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By PikMike, history, 2 months ago, In English,

1027A - Palindromic Twist

Tutorial
Solution (PikMike)

1027B - Numbers on the Chessboard

Tutorial
Solution (Vovuh)

1027C - Minimum Value Rectangle

Tutorial
Solution (PikMike)

1027D - Mouse Hunt

Tutorial
Solution (adedalic)

1027E - Inverse Coloring

Tutorial
Solution (PikMike) O(n^3)
Solution (BledDest) O(n^2)

1027F - Session in BSU

Tutorial
Solution (Vovuh)
Solution (Vovuh) Kuhn's Algorithm

1027G - X-mouse in the Campus

Tutorial
Solution (adedalic)

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By PikMike, history, 2 months ago, translation, In English,

On Aug/18/2018 17:35 (Moscow time) Educational Codeforces Round 49 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours 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 invented and prepared by Vladimir Vovuh Petrov, Adilbek adedalic Dalabaev, Ivan BledDest Androsov, Mike MikeMirzayanov Mirzyanov and me.

Good luck to all participants!

Our friends at Harbour.Space also have a message for you:

Hi Codeforces!

Our Hello Barcelona Programming Bootcamp will be kicking off next month from Sept 26 — Oct 4, and we’d love to see you there!

The boot camp will once again feature the all-time greats Mike MikeMirzayanov Mirzayanov, Andrey andrewzta Stankevich, Michael Endagorion Tikhomirov, Gleb GlebsHP Evstropov, Artem VArtem Vasilyev, Ivan ifsmirnov Smirnov and other world renowned Russian coaches to train the participants.

You will be competing and learning side by side with some of the greatest teams in the world, while learning from the best coaches the ICPC has to offer.

Be sure to register before September 1st so everyone has time to get visas if needed, and of course for the Early Bird Discount of 5% or the Loyalty Discount* of 20% off registration for the boot camp!

*The loyalty discount is offered to universities and individual participants that took part in Hello Barcelona Bootcamps and Moscow Workshops ICPC.

Learn more about Barcelona ICPC Bootcamp

You can ask any questions by email: hello@harbour.space

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 Um_nik 7 179
2 isaf27 7 343
3 RNS_KSB 7 357
4 eddy1021 6 157
5 djp_cqq 6 176

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 200:-25
2 eR6 87:-58
3 Winniechen 35:-13
4 jhonber 29:-1
5 Kaban-5 19
697 successful hacks and 674 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A arknave 0:02
B eddy1021 0:06
C bekzhan97 0:12
D teja349 0:12
E step_by_step 0:10
F lee_sin 0:24
G uwi 0:39

UPD: The editorial is posted

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By PikMike, history, 2 months ago, translation, In English,

On Aug/03/2018 17:45 (Moscow time) Educational Codeforces Round 48 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. After the end of the contest you will have 12 hours 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 invented and prepared by Ivan BledDest Androsov, Roman Ajosteen Glazov, Adilbek adedalic Dalabaev, Vladimir Vovuh Petrov and me.

Good luck to all participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 eddy1021 7 299
2 djp_cqq 6 240
3 halyavin 6 248
4 BigBag 6 250
5 IcePrince_1968 6 286

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 80:-21
2 Doriath 45:-10
3 antguz 25:-1
4 applese 12
5 Ne0n25 11:-2
236 successful hacks and 417 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A bazsi700 0:01
B bazsi700 0:05
C yjq_naiiive 0:17
D teja349 0:10
E yjq_naiiive 0:49
F eddy1021 0:41
G .................. 1:16

UPD: Editorial

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By PikMike, history, 3 months ago, translation, In English,

1009A - Game Shopping

Tutorial
Solution (Vovuh)

1009B - Minimum Ternary String

Tutorial
Solution (Vovuh)

1009C - Annoying Present

Tutorial
Solution (PikMike)

1009D - Relatively Prime Graph

Tutorial
Solution (PikMike)

1009E - Intercity Travelling

Tutorial
Solution (BledDest)

1009F - Dominant Indices

Tutorial
Solution (BledDest)

1009G - Allowed Letters

Tutorial
Solution (Bleddest)

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By PikMike, history, 3 months ago, translation, In English,

Hello Codeforces!

On Jul/14/2018 17:35 (Moscow time) Educational Codeforces Round 47 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. After the end of the contest you will have 12 hours 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 invented and prepared by Ivan BledDest Androsov, Vladimir Vovuh Petrov, Maksim Ne0n25 Mescheryakov, Aslan ag2cidk Tamaev and me.

Good luck to all participants!

I also have a message from our partner, Harbour.Space University:

Hi Codeforces!

We want to remind everyone that the Hello Barcelona Programming Bootcamp is right around the corner, and we’d love to see you there!

Our boot camp will once again feature the all-time greats Mike MikeMirzayanov Mirzayanov, Andrey andrewzta Stankevich, Michael Endagorion Tikhomirov, Gleb GlebsHP Evstropov, Artem VArtem Vasilyev, Ivan ifsmirnov Smirnov and other world renowned Russian coaches to train the participants.

We would also like to extend a welcome to some of the newest teams to join us from Colorado School of Mines, University of British Columbia and Reykjavík University.

Be sure to register before August 1st so everyone has time to get visas if needed, and of course for the Early Bird Discount of 15% or the Loyalty Discount* of 20% off registration for the boot camp!

*The loyalty discount is offered to universities and individual participants that took part in Hello Barcelona Bootcamps and Moscow Workshops ICPC.

Learn more about Barcelona ICPC Bootcamp

You can ask any questions by email: hello@harbour.space

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 e-pluszak 7 159
2 hohomu 7 274
3 guille 7 338
4 radoslav11 7 580
5 waynetuinfor 6 148

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 689:-132
2 2014CAIS01 91:-13
3 Marcel_Ib 20:-1
4 Ali_Pi 16:-3
5 20180616sG 15:-3
978 successful hacks and 798 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A AuroraGarden 0:01
B eddy1021 0:05
C e-pluszak 0:09
D hmc 0:09
E Roundgod 0:19
F radoslav11 0:15
G chemthan 0:28

UPD: The editorial is posted

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By PikMike, history, 4 months ago, translation, In English,

990A - Commentary Boxes

Tutorial
Solution (PikMike)

990B - Micro-World

Tutorial
Solution (adedalic)

990C - Bracket Sequences Concatenation Problem

Tutorial
Solution (Ajosteen)

990D - Graph And Its Complement

Tutorial
Solution (Ajosteen)

990E - Post Lamps

Tutorial
Solution (PikMike)

990F - Flow Control

Tutorial
Solution (PikMike)

990G - GCD Counting

Tutorial
Solution with Möbius (Bleddest)
Solution with centroid (adedalic)

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By PikMike, history, 4 months ago, In English,

Hello Codeforces!

On Jun/10/2018 13:05 (Moscow time) Educational Codeforces Round 45 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.

This round will be rated for the participants with rating lower than 2100. It will be held on extented ACM ICPC rules. After the end of the contest you will have 12 hours 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 invented and prepared by Adilbek adedalic Dalabaev, Roman Ajosteen Glazov, Ivan BledDest Androsov, Mike MikeMirzayanov Mirzayanov and me.

Good luck to all participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 KrK 7 225
2 isaf27 7 231
3 BigBag 7 325
4 Motarack 7 327
5 TangentDay 7 331

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 202:-52
2 2014CAIS01 26:-2
3 djm03178 20
4 saw.ai 19
5 antguz 25:-17
549 successful hacks and 525 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A tzuyu_chou 0:01
B DoomzDay 0:05
C 562225807 0:08
D teja349 0:12
E eddy1021 0:18
F nhho 0:45
G AChen142857 0:14

UPD: Editorial is out

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By PikMike, history, 5 months ago, translation, In English,

985A - Chess Placing

Tutorial
Solution (Vovuh)

985B - Switches and Lamps

Tutorial
Solution (Vovuh)

985C - Liebig's Barrels

Tutorial
Solution (adedalic)

985D - Sand Fortress

Tutorial
Solution (PikMike)

985E - Pencils and Boxes

Tutorial
Solution (PikMike)

985F - Isomorphic Strings

Tutorial
Solution (adedalic)

985G - Team Players

Tutorial
Solution (adedalic)

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By PikMike, history, 5 months ago, translation, In English,

Hello Codeforces!

On May/21/2018 17:45 (Moscow time) Educational Codeforces Round 44 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.

This round will be rated for the participants with rating lower than 2100. It 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 Adilbek adedalic Dalabaev, Vladimir Vovuh Petrov and me.

Good luck to all participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 Benq 6 143
2 crhkr 6 202
3 mjhun 6 210
4 nhho 6 210
5 krijgertje 6 223

Congratulations to the best hackers:

Rank Competitor Hack Count
1 step_by_step 248:-25
2 greencis 31:-6
3 zero-light-some 15
4 Necrozma 12
5 Codefocres 11:-1
703 successful hacks and 490 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A dotorya 0:01
B dotorya 0:03
C dotorya 0:10
D Benq 0:21
E SmsS4 0:07
F DarkestLight 0:49
G Marco_L_T 0:44

UPD: Editorial is uploaded

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By PikMike, history, 7 months ago, translation, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
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Tutorial is loading...
Tutorial is loading...
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Tutorial is loading...
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By PikMike, history, 7 months ago, translation, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
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By PikMike, history, 8 months ago, translation, In English,

Hello Codeforces!

On February 16, 18:05 MSK Educational Codeforces Round 38 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.

This round will be rated for Div. 2. It will be held on extented ACM ICPC rules. After the end of the contest you will have 12 hours 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 Ivan BledDest Androsov, Sahand Sahaand Alitanloo and me.

Thanks Mike MikeMirzayanov Mirzayanov for great system Polygon!

Good luck to all participants!

UPD: Since there will be another Div. 2 contest soon, the hacking phase will be shorter (only 12 hours). Before CF Round 464 we will actualize the registrations in such a way that Div. 2 will be officially registered, and Div. 1 participants — unofficially.

UPD2: We also have a message from our partners Harbour.Space:

We are excited to announce that some of the world’s strongest teams will come to our Hello India x Russia Programming Bootcamp: MIPT and all top India’s Universities that qualified to the World Finals!

As always, the boot camp isn’t only about the training — we’re in the process of getting renowned keynote speakers from all over the globe to come and speak about life and all the opportunities at your fingertips after ACM-ICPC.

We look forward to seeing you all there this spring! For those of you who haven't registered, there's still time.

Register here

If you have any questions we can help you with, please connect with us:

Phone number: +34 674 291 422 Email Address: hello@harbour.space

UPD3: Editorial is published

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By PikMike, history, 10 months ago, translation, In English,

Hello Codeforces!

On December 28, 17:05 MSK Educational Codeforces Round 35 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.

This round will be rated for Div. 2. It 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 Ivan BledDest Androsov, Vladimir 0n25 Petrov, Alexey Perforator Ripinen and me.

Thanks Mike MikeMirzayanov Mirzayanov for great system Polygon!

Good luck to all participants!

We also have a message from our partners, Harbour.Space University:

Hello everyone!

Registration is open for our upcoming 1st Hello India x Russia Programming Bootcamp, with 20 teams signed up and counting, and we are looking forward to seeing you and your teammates in India this March!

More information

Register here

UPD: There will be 7 problems!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 bmerry 7 212
2 uwi 7 216
3 halyavin 7 287
4 HS432 7 314
5 voidmax 7 337

Congratulations to the best hackers:

Rank Competitor Hack Count
1 halyavin 328:-26
2 Mohammad_kilani 107:-6
3 Aemon 91:-33
4 algmyr 57:-4
5 Yazdan_ra 29:-9

1761 successful hacks and 1237 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A Delsin 0:01
B Benq 0:03
C DTSBT 0:06
D PrashantM 0:08
E perchema 0:15
F pekempey 0:38
G chemthan 0:21

UPD2: Editorial is out

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By PikMike, history, 11 months ago, translation, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
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By PikMike, history, 12 months ago, translation, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
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By PikMike, history, 12 months ago, translation, In English,

Hello Codeforces!

On October 27, 17:05 MSK Educational Codeforces Round 31 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 6 problems and 2 hours to solve them.

The problems were prepared by Ivan BledDest Androsov, Vladimir 0n25 Petrov, Alexey Perforator Ripinen, Mike MikeMirzayanov Mirzayanov and me.

Good luck to all participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 biGinNer 6 175
2 natsugiri 6 228
3 palayutm 6 283
4 LHiC 6 293
5 eddy1021 6 295

Congratulations to the best hackers:

Rank Competitor Hack Count
1 Hinata_On_Fire 18
2 halyavin 22:-10
3 dreamoon 33:-35
4 kuko- 15
5 STommydx 12:-1

259 successful hacks and 368 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A eddy1021 0:01
B eddy1021 0:02
C gritukan 0:06
D cyand1317 0:18
E eddy1021 0:36
F zscoder 0:35

UPD: Editorial is uploaded

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By PikMike, history, 12 months ago, translation, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...

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By PikMike, history, 12 months ago, translation, In English,

Hello Codeforces!

On October 12, 17:05 MSK Educational Codeforces Round 30 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 6 problems and 2 hours to solve them.

The problems were prepared by Ivan BledDest Androsov, Vladimir 0n25 Petrov, Mike MikeMirzayanov Mirzayanov and me.

Good luck to all participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 irkstepanov 6 141
2 SPFA_THE_BEST_ALGORITHM 6 169
3 KrK 6 199
4 chemthan 6 200
5 Shik 6 214

Congratulations to the best hackers:

Rank Competitor Hack Count
1 jhonber 75:-6
2 halyavin 31:-8
3 Zaher 6:-2
4 Khaled_Mohamed 4:-1
5 silicon_lover 2

123 successful hacks and 96 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A I_love_Maria_Ivanova 0:01
B gritukan 0:04
C eddy1021 0:08
D unused 0:14
E irkstepanov 0:44
F xjlinyueru 0:23

UPD: Editorial is published

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By PikMike, history, 14 months ago, In English,

Hello Codeforces!

On August 21, 18:05 MSK Educational Codeforces Round 27 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 Ivan BledDest Androsov, Vladimir 0n25 Petrov, Mike MikeMirzayanov Mirzayanov and me.

Good luck to all participants!

Harbour.Space also has a word for you:

We are delighted to welcome the 2017 ACM-ICPC World Champions, ITMO, to our 2nd Hello Barcelona Programming Bootcamp in collaboration with Moscow Workshops ACM ICPC starting September 27.

All the top Russian teams are coming, including St. Petersburg State University, MIPT, Ural Federal University, Tomsk, Novosibirsk, Saratov and Perm, as well as the world’s top universities such as Waterloo, Central Florida, Hangzhou Dianzi, Singapore, KTH and dozens of others — so far teams from 30 countries have signed up.

The event’s gold sponsor is Sberbank, the biggest commercial and investment bank of Eastern Europe and Russia. Thanks to their support we expect that the top participants will be awarded valuable prizes, alongside high-profile internship and job opportunities.

We can’t wait to see all of you coming to learn, practice and compete on the international stage, smoothing your road towards April World Finals in Beijing.

Ps. Registrations close on September 1.

UPD: Editorial is published

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 uwi 7 288
2 quailty 7 314
3 Andrei1998 7 318
4 rajat1603 7 374
5 fatego 7 374

Congratulations to the best hackers:

Rank Competitor Hack Count
1 uwi 455:-11
2 halyavin 305:-4
3 STommydx 103:-2
4 Lhtie 48:-2
5 step_by_step 44:-28

1326 successful hacks and 300 unsuccessful hacks were made in total!

And finally people who were the first to solve each problem:

Problem Competitor Penalty
A ksun48 0:01
B jufusong 0:03
C markysha 0:03
D EKGMA 0:10
E halyavin 0:37
F eddy1021 0:34
G const_int_magic 0:08

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By PikMike, history, 14 months ago, translation, In English,
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