Educational Codeforces Round 154 [Rated for Div. 2]

Revision en5, by awoo, 2023-09-01 18:51:25

Hello Codeforces!

On Aug/31/2023 17:35 (Moscow time) Educational Codeforces Round 154 (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, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov and me. Also, huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Additionally, big thanks to the tester stAngel for their valuable advice and suggestions!

Good luck to all the participants!

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


Harbour.Space University has partnered with Giga (UNICEF) to offer Master’s degree scholarships in the field of Data Science, as well as work experience.

We are looking for various junior to mid level candidates:

Data Scientist:

  • Strong ML knowledge
  • Experience with Data Visualization Tools like matplotlib, ggplot, d3.js., Tableau that helps to visually encode data
  • Excellent Communication Skills – it is incredibly important to describe findings to a technical and non-technical audience
  • Strong Software Engineering Background
  • Hands-on experience with data science tools
  • Problem-solving aptitude
  • Analytical mind and great business sense
  • Degree in Computer Science, Engineering or relevant field is preferred

Data Analyst:

  • Cleansing and preparing data
  • Analyzing and exploring data
  • Expertise in statistics
  • Analyzing and visualizing data
  • Reports and dashboards
  • Communication and writing
  • Expertise in the domain
  • Solution-oriented

All successful applicants will be eligible for a 100% tuition fee scholarship (29.900 €/year) provided by the partner company.


Study Commitment: 3 hours/day

You will complete 15 modules (each three weeks long) in one year. Daily class workload is 3 hours, plus homework to complete in your own time.

Work Commitment: 4+ hours/day

Immerse yourself in the professional world during your apprenticeship. You’ll learn from the best and get to apply your newly acquired knowledge in the field from day one.


  • Industry experience
  • International exposure
  • Eager to learn
  • Sustainability is a key topic for you
  • You want to work for an NGO
Apply here →

UPD: Editorial is out


  Rev. Lang. By When Δ Comment
ru5 Russian awoo 2023-09-01 18:52:07 71
en5 English awoo 2023-09-01 18:51:25 71
en4 English awoo 2023-08-31 19:09:51 111 Tiny change: 'ngel] for her valuable' -> 'ngel] for their valuable'
ru4 Russian awoo 2023-08-31 19:09:04 94
ru3 Russian Una_Shem 2023-08-30 20:40:44 2713
ru2 Russian Una_Shem 2023-08-30 18:21:25 0 (опубликовано)
en3 English Una_Shem 2023-08-30 18:21:15 0 (published)
en2 English Una_Shem 2023-08-30 18:21:01 2556 Tiny change: 'ticipants!' -> 'ticipants!\n\n'
en1 English awoo 2023-08-30 15:22:56 1253 Initial revision for English translation (saved to drafts)
ru1 Russian awoo 2023-08-30 15:21:51 1365 Первая редакция (сохранено в черновиках)