Educational Codeforces Round 110 [Rated for Div. 2]

Revision en5, by awoo, 2021-06-05 20:07:09

Hello Codeforces!

On Jun/04/2021 17:35 (Moscow time) Educational Codeforces Round 110 (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 Roman Roms Glazov, 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:

Codeforces and Harbour.Space

Hey, Codeforces!

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

If you love technology, enjoy creating, and looking for an exciting career, Front-end Development might be for you! This time we are looking for talented individuals to launch our new programme with.

We are offering up to a 50% scholarship for our Bachelor’s and Master’s degrees, opening the doors for an exciting career in technology for the most talented people in our network.


  1. Diploma and transcript of the highest attained education level
  2. Professional fluency in English
  3. Your CV

What you will learn:

  • Coding up to industry standards
  • Accelerated learning
  • Master new tech frequency
  • Javascript frameworks, CSS preprocessors and methodologies, responsiveness, and also visual design
  • And more

Make sure to apply before June 30, 2021, to be eligible for the scholarship and reduced application fee.

Some of the advantages of studying at Harbour.Space:

  • We change the way of learning
  • We learn by doing
  • We are your home

We are always happy to see Codeforces members join the Harbour.Space family. Apply now to learn from the best in the field and kickstart your career!

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

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 SSRS_ 6 118
2 Maksim1744 6 137
3 Geothermal 6 147
4 neal 6 154
5 Ormlis 6 167

Congratulations to the best hackers:

Rank Competitor Hack Count
1 Kawaii 51:-7
2 coder_ym_ 28:-3
3 meyi 27:-4
4 DespicableMonkey 21
5 DevilAeron 20:-5
342 successful hacks and 911 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 neal 0:02
C Geothermal 0:05
D SSRS_ 0:12
E _runtimeTerror_ 0:18
F xay5421 1:01

UPD: Editorial is out


  Rev. Lang. By When Δ Comment
en5 English awoo 2021-06-05 20:07:09 2528
ru8 Russian awoo 2021-06-05 20:06:36 2504
en4 English awoo 2021-06-05 20:04:36 70
ru7 Russian awoo 2021-06-05 20:04:07 74
ru6 Russian Una_Shem 2021-06-03 22:57:05 2 Мелкая правка: 'аявку до 31 июня 2021' -> 'аявку до 30 июня 2021'
ru5 Russian Una_Shem 2021-06-03 22:32:06 0 (опубликовано)
ru4 Russian Una_Shem 2021-06-03 22:31:56 38 (сохранено в черновиках)
ru3 Russian Una_Shem 2021-06-03 22:16:35 2161
en3 English Una_Shem 2021-06-03 17:58:56 2 Tiny change: 'design_\n-_ And more_\' -> 'design_\n- _And more_\'
ru2 Russian Una_Shem 2021-06-03 17:58:17 0 (опубликовано)
en2 English Una_Shem 2021-06-03 17:58:09 2074 (published)
en1 English awoo 2021-06-03 16:29:14 1284 Initial revision for English translation (saved to drafts)
ru1 Russian awoo 2021-06-03 16:27:10 1400 Первая редакция (сохранено в черновиках)