awoo's blog

By awoo, history, 2 years ago, translation, In English

1661A - Array Balancing

Idea: BledDest

Tutorial
Solution (adedalic)

1661B - Getting Zero

Idea: adedalic

Tutorial
Solution (adedalic)

1661C - Water the Trees

Idea: vovuh

Tutorial
Solution 1 (vovuh)
Solution 2 (awoo)

1661D - Progressions Covering

Idea: vovuh

Tutorial
Solution (vovuh)

1661E - Narrow Components

Idea: BledDest

Tutorial
Solution (awoo)

1661F - Teleporters

Idea: vovuh

Tutorial
Solution (BledDest)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Apr/09/2022 17:35 (Moscow time) Educational Codeforces Round 126 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

1657A - Integer Moves

Idea: BledDest

Tutorial
Solution (Neon)

1657B - XY Sequence

Idea: adedalic

Tutorial
Solution (adedalic)

1657C - Bracket Sequence Deletion

Idea: BledDest

Tutorial
Solution (vovuh)

1657D - For Gamers. By Gamers.

Idea: BledDest

Tutorial
Solution (awoo)

1657E - Star MST

Idea: BledDest

Tutorial
Solution (awoo)

1657F - Words on Tree

Idea: BledDest

Tutorial
Solution (awoo)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Mar/22/2022 17:45 (Moscow time) Educational Codeforces Round 125 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out.

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By awoo, history, 2 years ago, translation, In English

1651A - Playoff

Idea: BledDest

Tutorial
Solution (BledDest)

1651B - Prove Him Wrong

Idea: adedalic

Tutorial
Solution (awoo)

1651C - Fault-tolerant Network

Idea: adedalic

Tutorial
Solution (adedalic)

1651D - Nearest Excluded Points

Idea: BledDest

Tutorial
Solution (vovuh)

1651E - Sum of Matchings

Idea: BledDest

Tutorial
Solution (BledDest)

1651F - Tower Defense

Idea: BledDest

Tutorial
Solution (awoo)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Mar/10/2022 17:35 (Moscow time) Educational Codeforces Round 124 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

1644A - Doors and Keys

Idea: BledDest

Tutorial
Solution (awoo)

1644B - Anti-Fibonacci Permutation

Idea: BledDest

Tutorial
Solution (Neon)

1644C - Increase Subarray Sums

Idea: BledDest

Tutorial
Solution (awoo)

1644D - Cross Coloring

Idea: BledDest

Tutorial
Solution 1 (awoo)
Solution 2 (awoo)

1644E - Expand the Path

Idea: BledDest

Tutorial
Solution (awoo)

1644F - Basis

Idea: BledDest

Tutorial

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Feb/22/2022 17:35 (Moscow time) Educational Codeforces Round 123 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

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

Harbour.Space

Hey, Codeforces!

Once again, it is time for another exciting scholarship opportunity from Harbour.Space!

We have partnered with various tech companies to offer Bachelor’s or Master’s degree scholarships in Computer Science, Data Science, Cyber Security, and Front-end Development and work experience in the partnered companies.

We are looking for various junior to mid-level positions to fill in different fields such as:

  • Java Spring / Node.js Back-End Developer
  • DevOps Engineer
  • Kotlin Web App Developer
  • React / React Native Front-End Developer
  • Cyber Security Specialist

Requirements:

  1. High School Diploma for Bachelor degree applicants or Bachelor’s degree for Master degree applicants
  2. Professional fluency in English
  3. Previous experience is a must for Master student applicants and a plus for Bachelor student applicants

Make sure to apply before Mar 13, 2022, to be eligible for the scholarship and reduced application fee.

APPLY NOW →

Keep in touch and follow us on LinkedIn for more scholarship opportunities. And follow us on Instagram to evidence student life, events, and success stories from students.

Good luck on your round, and see you next time!

Harbour.Space University

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Jan/31/2022 17:35 (Moscow time) Educational Codeforces Round 122 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out.

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By awoo, history, 2 years ago, translation, In English

1626A - Equidistant Letters

Idea: BledDest

Tutorial
Solution (awoo)

1626B - Minor Reduction

Idea: BledDest

Tutorial
Solution (awoo)

1626C - Monsters And Spells

Idea: BledDest

Tutorial
Solution (awoo)

1626D - Martial Arts Tournament

Idea: BledDest

Tutorial
Solution (awoo)

1626E - Black and White Tree

Idea: BledDest

Tutorial
Solution (BledDest)

1626F - A Random Code Problem

Idea: BledDest

Tutorial
Solution (BledDest)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Jan/16/2022 17:35 (Moscow time) Educational Codeforces Round 121 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Unfortunately, the round is unrated. We are sorry for the inconvenience. You can upsolve the problems using the Codeforces archive.

UPD: Editorial is out.

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By awoo, history, 2 years ago, translation, In English

1622A - Construct a Rectangle

Idea: BledDest

Tutorial
Solution (Neon)

1622B - Berland Music

Idea: adedalic

Tutorial
Solution (awoo)

1622C - Set or Decrease

Idea: adedalic

Tutorial
Solution (adedalic)

1622D - Shuffle

Idea: BledDest

Tutorial
Solution (BledDest)

1622E - Math Test

Idea: BledDest

Tutorial
Solution (Neon)

1622F - Quadratic Set

Idea: Neon

Tutorial
Solution (Neon)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On 27.12.2021 17:35 (Московское время) Educational Codeforces Round 120 (рейтинговый для 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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

1620A - Equal or Not Equal

Idea: BledDest

Tutorial
Solution (Neon)

1620B - Triangles on a Rectangle

Idea: BledDest

Tutorial
Solution (awoo)

1620C - BA-String

Idea: BledDest

Tutorial
Solution (awoo)

1620D - Exact Change

Idea: adedalic

Tutorial
Solution (adedalic)

1620E - Replace the Numbers

Idea: Neon

Tutorial
Solution 1 (Neon)
Solution 2 (Neon)

1620F - Bipartite Array

Idea: BledDest and Neon

Tutorial
Solution 1 (Neon)
Solution 2 (Neon)

1620G - Subsequences Galore

Idea: BledDest

Tutorial
Solution (BledDest)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Dec/18/2021 18:35 (Moscow time) Educational Codeforces Round 119 (Rated for Div. 2) will start. Please, note the unusual start time.

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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

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

Codeforces and Harbour.Space

Hello once again, Codeforces!

Almost 5 months have passed since we organized the Harbour.Space Scholarship Contest 2021-2022. It’s been quite a tough challenge with more than 15,000 participants. However, we were able to select the ones who were ready to take the opportunity and join Harbour.Space this year. In addition to the contest, we carefully reviewed all scholarship applications and awarded a total of 11 students.

We would like to introduce you our Competitive Programming Scholarship Winners who have already arrived to Barcelona:

aniervs, MaksymOboznyi, 244mhq, Meijer, bthero,amanbol, DimmyT, 998kover

We are looking forward to achieving incredible results with our new ICPC teams. One of them, Harbour.Backspace (MaksymOboznyi, 244mhq, 998kover), has already finished in 3rd place during Moscow Workshops. We wish them the best in the upcoming contests.

Codeforces and Harbour.Space

As usual, we are always excited to see Codeforces participants as our students here at Harbour.Space

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

1613A - Long Comparison

Idea: BledDest

Tutorial
Solution (awoo)

1613B - Absent Remainder

Idea: BledDest

Tutorial
Solution (Neon)

1613C - Poisoned Dagger

Idea: BledDest

Tutorial
Solution (Neon)

1613D - MEX Sequences

Idea: BledDest

Tutorial
Solution (Neon)

1613E - Crazy Robot

Idea: BledDest

Tutorial
Solution (awoo)

1613F - Tree Coloring

Idea: BledDest

Tutorial
Solution (BledDest)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Dec/01/2021 17:35 (Moscow time) Educational Codeforces Round 118 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Nov/22/2021 12:35 (Moscow time) Educational Codeforces Round 117 (Rated for Div. 2) will start.

The problems are based on the Southern Russia and Volga Cup 2021, which is a regional contest of ICPC. If you have participated in it or are planning to play it as a virtual contest, please refrain from taking part in the Educational Round.

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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out.

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By awoo, history, 2 years ago, translation, In English

1606A - AB Balance

Idea: BledDest

Tutorial
Solution (adedalic)

1606B - Update Files

Tutorial
Solution (Neon)

1606C - Banknotes

Idea: BledDest

Tutorial
Solution (Neon)

1606D - Red-Blue Matrix

Idea: BledDest

Tutorial
Solution (awoo)

1606E - Arena

Idea: BledDest

Tutorial
Solution (Neon)

1606F - Tree Queries

Idea: BledDest

Tutorial
Solution (BledDest)

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By awoo, history, 2 years ago, translation, In English

Hello Codeforces!

On Oct/29/2021 17:35 (Moscow time) Educational Codeforces Round 116 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

UPD: Editorial is out.

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By awoo, history, 3 years ago, translation, In English

1598A - Computer Game

Idea: BledDest

Tutorial
Solution (BledDest)

1598B - Groups

Idea: fcspartakm

Tutorial
Solution (BledDest)

1598C - Delete Two Elements

Idea: fcspartakm

Tutorial
Solution (Neon)

1598D - Training Session

Idea: BledDest

Tutorial
Solution (Neon)

1598E - Staircases

Idea: BledDest

Tutorial
Solution (awoo)

1598F - RBS

Idea: BledDest

Tutorial
Solution (BledDest)

1598G - The Sum of Good Numbers

Idea: BledDest

Tutorial
Solution (Neon)

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By awoo, history, 3 years ago, translation, In English

1574A - Regular Bracket Sequences

Idea: BledDest

Tutorial
Solution (BledDest)

1574B - Combinatorics Homework

Idea: BledDest

Tutorial
Solution (awoo)

1574C - Slay the Dragon

Idea: BledDest

Tutorial
Solution (Neon)

1574D - The Strongest Build

Idea: BledDest

Tutorial
Solution (awoo)

1574E - Coloring

Idea: Roms

Tutorial
Solution (Roms)

1574F - Occurrences

Idea: BledDest

Tutorial
Solution (BledDest)

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By awoo, history, 3 years ago, translation, In English

Hello Codeforces!

On Sep/20/2021 17:35 (Moscow time) Educational Codeforces Round 114 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 tourist 6 82
2 LayCurse 6 158
3 LJC00118 6 159
4 mtsd 6 207
5 244mhq 6 212

Congratulations to the best hackers:

Rank Competitor Hack Count
1 Savior-of-Cross 20:-4
2 tzc_wk 12:-5
3 TheAshenWitch 9
4 SSerxhs 9:-1
5 Makise_Kurisu 10:-6
84 successful hacks and 270 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Ormlis 0:01
B KPATKOBPEMEHHOCTb 0:01
C gleb.astashkin 0:05
D tourist 0:12
E tourist 0:21
F Potassium 0:23

UPD: Editorial is out

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By awoo, history, 3 years ago, translation, In English

1569A - Balanced Substring

Idea: BledDest

Tutorial
Solution (awoo)

1569B - Chess Tournament

Idea: BledDest

Tutorial
Solution (Neon)

1569C - Jury Meeting

Idea: BledDest

Tutorial
Solution (Neon)

1569D - Inconvenient Pairs

Idea: BledDest

Tutorial
Solution (adedalic)

1569E - Playoff Restoration

Idea: BledDest

Tutorial
Solution (BledDest)

1569F - Palindromic Hamiltonian Path

Idea: BledDest

Tutorial
Solution (awoo)

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By awoo, history, 3 years ago, translation, In English

Hello Codeforces!

On Sep/08/2021 17:35 (Moscow time) Educational Codeforces Round 113 (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 extended 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 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 Geothermal 6 183
2 qpEDop_MuXauJloBu4 6 216
3 hanbyeol_ 6 219
4 tute7627 6 221
5 fastmath 6 287

69 nice successful hacks and 304 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Geothermal 0:00
B Geothermal 0:04
C Geothermal 0:07
D jayeshaw 0:18
E tzc_wk 0:28
F jiangly 0:30

UPD: Editorial is out

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