Educational Codeforces Round 89 [Rated for Div. 2]

Revision en7, by awoo, 2020-06-12 18:56:46

Hello Codeforces!

On Jun/11/2020 17:35 (Moscow time) Educational Codeforces Round 89 (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!

A couple of weeks ago, we had the pleasure of hosting a webinar featuring Sergey Gordeichik, CIO of the Inception Institute of Artificial Intelligence and Director of the University’s Cybersecurity Programme.

In his talk, Sergey shared his expertise and insights on how AI is being used both positively and negatively during the COVID-19 global pandemic. He touched on topics such as the ethics of using this technology, and how it was implemented during each phase of the pandemic.

We know not everyone had the chance to tune in during the webinar, so we thought you’d be interested in having a look at the slide deck of his presentation.

You can check it out here.

If this was interesting for you, let us know in the comments, and we’ll do our best to try and provide more content like this. Keep an eye out for the final two talks in our webinar series — they might be of interest to you :)

Finally, don’t forget that this July, Sergey is teaching a course on the Cybersecurity of Cloud, Big Data, and AI. The course will be 100% online, so be sure to check it out on our website if you’re interested. Here’s the link.

That’s all from us!

Good luck in the round, and we’ll see you soon!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 ksun48 7 188
2 saketh 7 264
3 hank55663 7 320
4 kefaa2 6 109
5 Radewoosh 6 126

Congratulations to the best hackers:

Rank Competitor Hack Count
1 Hakiobo 70
2 napgod_pk 67:-12
3 Zaher 71:-21
4 VladProg 60
5 BohdanPastuschak 62:-26

1115 successful hacks and 2003 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A neal 0:00
B neal 0:02
C ksun48 0:05
D BohdanPastuschak 0:05
E ksun48 0:15
F kort0n 0:51
G rainboy 0:25

UPD: Editorial is out


  Rev. Lang. By When Δ Comment
ru5 Russian awoo 2020-06-12 18:58:33 2522
en7 English awoo 2020-06-12 18:56:46 2546
en6 English awoo 2020-06-12 18:54:02 70
ru4 Russian awoo 2020-06-12 18:53:39 72
ru3 Russian Una_Shem 2020-06-10 22:18:19 1712
en5 English Una_Shem 2020-06-10 20:23:33 0 (published)
en4 English Una_Shem 2020-06-10 20:23:20 2 Tiny change: 'chik/)._\n_That’s ' -> 'chik/)._\n\n_That’s ' (saved to drafts)
ru2 Russian Una_Shem 2020-06-10 20:22:50 0 (опубликовано)
en3 English Una_Shem 2020-06-10 20:22:38 9 (published)
en2 English Una_Shem 2020-06-10 20:20:14 1732
en1 English awoo 2020-06-10 17:10:58 1285 Initial revision for English translation (saved to drafts)
ru1 Russian awoo 2020-06-10 17:10:10 1401 Первая редакция (сохранено в черновиках)