Codeforces Round #642 (Div. 3)

Revision en5, by vovuh, 2020-05-14 15:35:08

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Hello! Codeforces Round 642 (Div. 3) will start at May/14/2020 17:35 (Moscow time). You will be offered 6 or 7 problems (or 8) with expected difficulties to compose an interesting competition for participants with ratings up to 1600. However, all of you who wish to take part and have rating 1600 or higher, can register for the round unofficially.

The round will be hosted by rules of educational rounds (extended ACM-ICPC). Thus, during the round, solutions will be judged on preliminary tests, and after the round it will be a 12-hour phase of open hacks. I tried to make strong tests — just like you will be upset if many solutions fail after the contest is over.

You will be given 6 or 7 (or 8) problems and 2 hours to solve them.

Note that the penalty for the wrong submission in this round (and the following Div. 3 rounds) is 10 minutes.

Remember that only the trusted participants of the third division will be included in the official standings table. As it is written by link, this is a compulsory measure for combating unsporting behavior. To qualify as a trusted participants of the third division, you must:

  • take part in at least two rated rounds (and solve at least one problem in each of them),
  • do not have a point of 1900 or higher in the rating.

Regardless of whether you are a trusted participant of the third division or not, if your rating is less than 1600, then the round will be rated for you.

Thanks to MikeMirzayanov for the platform, help with ideas for problems and for coordination of my work. Thanks to my good friends Daria nooinenoojno Stepanova, Mikhail awoo Piklyaev, Maksim Neon Mescheryakov and Ivan BledDest Androsov for help in round preparation and testing the round. Also thanks to Artem Rox Plotkin and Dmitrii _overrated_ Umnov for the discussion of ideas and testing the round!

Good luck!

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UPD: Thanks to ma_da_fa_ka, Jaydeep999997, abhishek_saini, infinitepro and socho for testing the round!

Tags codeforces, 642, third division

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ru6 Russian vovuh 2020-05-14 19:35:53 76
en6 English vovuh 2020-05-14 19:35:28 80
ru5 Russian vovuh 2020-05-14 15:35:28 34 Мелкая правка: '4], [user:i' -> '4], [user:abhishek_saini], [user:i'
en5 English vovuh 2020-05-14 15:35:08 34 Tiny change: '4], [user:i' -> '4], [user:abhishek_saini], [user:i'
ru4 Russian vovuh 2020-05-14 12:59:52 31 Мелкая правка: '020-05-14] и [user:' -> '020-05-14], [user:infinitepro] и [user:'
en4 English vovuh 2020-05-14 12:59:37 31 Tiny change: '020-05-14] and [use' -> '020-05-14], [user:infinitepro] and [use'
ru3 Russian vovuh 2020-05-14 10:19:00 133
en3 English vovuh 2020-05-14 10:18:21 136
ru2 Russian vovuh 2020-05-13 11:48:23 38 Мелкая правка: 'Your title here...\n==================&lt;almost' -> '&lt;almost'
en2 English vovuh 2020-05-13 11:37:10 0 (published)
ru1 Russian vovuh 2020-05-13 11:37:01 2164 Первая редакция перевода на Русский
en1 English vovuh 2020-05-13 11:35:28 2131 Initial revision (saved to drafts)