Educational Codeforces Round 106 [Rated for Div. 2]

Revision en6, by awoo, 2021-03-19 17:32:01

Hello Codeforces!

On Mar/18/2021 17:50 (Moscow time) Educational Codeforces Round 106 (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

Dear Codeforces!

We are coming with another scholarship opportunity to share with you. This time, our scholarship is targeted towards the brightest women in the community.

As you might know, March is the month where the whole world celebrates women. At Harbour.Space we want to use this opportunity to encourage more women to join the tech world and challenge the gender-bias in this field.

We believe that gender equality in the workplace starts with gender equality in the classroom. For that reason, we are offering our Women in Tech Scholarship. The scholarship consists of:

  • 50% off the yearly tuition fee: covers around €29,000 for bachelors and €11,450 for masters.
  • 32% off the application fee: €85 instead of €125

You can find more information about the scholarship here.



Make sure to apply before March 31st to benefit from the scholarship and discount.

Don’t hesitate to share this opportunity with any bright women in your personal circle as well. A simple share can help us transform someone's life.

We are always happy to see Codeforce members join the Harbour.Space family.

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

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

Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 dlalswp25 6 128
2 Maksim1744 6 138
2 IntoTheNight 6 138
4 nuip 6 149
4 kotatsugame 6 149

149 successful hacks and 1485 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A pavement 0:01
B PCTprobability 0:04
C PCTprobability 0:08
D Parliament 0:09
E KaladinStormblessed 0:17
F 718_MiL 0:10
G rainboy 1:27

UPD: Editorial is out


  Rev. Lang. By When Δ Comment
en6 English awoo 2021-03-19 17:32:01 30
ru8 Russian awoo 2021-03-19 17:31:29 40
en5 English awoo 2021-03-19 17:29:52 1676
ru7 Russian awoo 2021-03-19 17:29:27 1654
en4 English awoo 2021-03-19 17:28:01 70
ru6 Russian awoo 2021-03-19 17:27:45 72
en3 English Una_Shem 2021-03-18 21:51:47 75
ru5 Russian Una_Shem 2021-03-18 21:50:59 75
ru4 Russian Una_Shem 2021-03-17 23:58:57 415
ru3 Russian Una_Shem 2021-03-17 21:23:40 2379
ru2 Russian Una_Shem 2021-03-17 19:22:29 0 (опубликовано)
en2 English Una_Shem 2021-03-17 19:22:18 2308 (published)
en1 English awoo 2021-03-17 17:10:39 1284 Initial revision for English translation (saved to drafts)
ru1 Russian awoo 2021-03-17 17:09:49 1400 Первая редакция (сохранено в черновиках)