Educational Codeforces Round 78 [Rated for Div. 2]

Revision en5, by awoo, 2019-12-20 19:49:40

Hello Codeforces!

On 19.12.2019 17:35 (Московское время) Educational Codeforces Round 78 (рейтинговый для Див. 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 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

Hi Codeforces!

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Also, don’t forget to read our newest blogs!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 HIR180 6 106
2 neal 6 162
3 receed 6 172
4 Geothermal 6 174
5 cerberus97 6 179

Congratulations to the best hackers:

Rank Competitor Hack Count
1 Akulyat 24
2 hoke_t 20
3 dhxh 18:-1
4 vovanstrr 14
5 WNG 13:-1
255 successful hacks and 458 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Dalgerok 0:01
B neal 0:04
C HIR180 0:08
D Tutis 0:17
E gxnncrx1993 0:20
F jqdai0815 0:07

UPD: Editorial is out


  Rev. Lang. By When Δ Comment
en5 English awoo 2019-12-20 19:49:40 72
ru6 Russian awoo 2019-12-20 19:49:19 74
en4 English awoo 2019-12-20 19:29:48 230
ru5 Russian awoo 2019-12-20 19:29:33 230
en3 English awoo 2019-12-20 19:25:46 2653
ru4 Russian awoo 2019-12-20 19:25:30 2633
ru3 Russian Una_Shem 2019-12-18 19:18:14 1770
ru2 Russian Una_Shem 2019-12-18 18:18:36 0 (опубликовано)
en2 English Una_Shem 2019-12-18 18:04:45 1653 (published)
en1 English awoo 2019-12-18 17:02:04 1280 Initial revision for English translation (saved to drafts)
ru1 Russian awoo 2019-12-18 17:00:53 1396 Первая редакция (сохранено в черновиках)