Codeforces Round #498 (Div. 3)

Revision en12, by Vovuh, 2018-07-17 19:28:39


Finally I am freed from the big part of summer cares and I can continue the preparation of Div. 3 rounds! I decided to add something written by me to this blog because TryToKnowMe (and many others, i think) noticed that i am really copy and paste this text from one announcement to another changing only contest name and start time. But... Who knows, may be this time which is saved by copy-pasting the announcement allows me to prepare the problems better?... Let it stay a mystery. So, let's go.

Codeforces Round #498 (Div. 3) will start at Jul/16/2018 17:35 (Moscow time). You will be offered 6 problems with expected difficulties to compose an interesting competition for participants with ratings up to 1600. Probably, participants from the first division will not be at all interested by this problems. And for 1600-1899 the problems will be too easy. 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 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 Mikhail PikMike Piklyaev, Maksim Ne0n25 Mescheryakov and Ivan BledDest Androsov for help in round preparation and testing the round.

Good luck!

UPD: Also great thanks to the testers uwi, mareksom and ivan100sic for their invaluable help with the round preparation!

UPD2: Results table!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 HighPressure 6 236
2 LividFox 6 237
3 Rzuji 6 265
4 Syvail 6 273
5 khadgar1998 6 279

Congratulations to the best hackers:

Rank Competitor Hack Count
1 jhonber 131:-7
2 antguz 9
3 ducdien2267 9:-3
4 djm03178 6:-1
5 imlk 4

199 successful hacks and 232 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A eggmath 0:01
B eggmath 0:06
C thidailoc 0:07
D MoreThanANoob 0:23
E Student_of_Husayn 0:07
F NoTrolleNoLife 0:18

UPD3: Editorial is published.

Tags codeforces, 498, third division


  Rev. Lang. By When Δ Comment
ru11 Russian Vovuh 2018-07-17 19:28:56 73
en12 English Vovuh 2018-07-17 19:28:39 77
ru10 Russian Vovuh 2018-07-17 15:26:30 66
en11 English Vovuh 2018-07-17 15:26:09 66
en10 English Vovuh 2018-07-17 14:54:28 109
ru9 Russian Vovuh 2018-07-17 14:54:10 109
ru8 Russian Vovuh 2018-07-17 13:58:30 2524
en9 English Vovuh 2018-07-17 13:56:50 2520 Tiny change: '>\n <td>6</td>\n ' -> '>\n <td>5</td>\n '
en8 English Vovuh 2018-07-16 14:25:00 182
ru7 Russian Vovuh 2018-07-16 14:22:54 0 (опубликовано)
ru6 Russian Vovuh 2018-07-16 14:22:42 166 (сохранено в черновиках)
ru5 Russian Vovuh 2018-07-15 21:03:01 110
en7 English Vovuh 2018-07-15 21:00:12 4 Tiny change: 'te that **penalty** ' -> 'te that **the penalty** '
en6 English Vovuh 2018-07-15 20:59:44 117
ru4 Russian Vovuh 2018-07-15 01:59:02 0 (опубликовано)
en5 English Vovuh 2018-07-15 01:58:51 0 (published)
en4 English Vovuh 2018-07-15 01:57:50 1 Tiny change: 'on of Div.3 rounds! ' -> 'on of Div. 3 rounds! '
ru3 Russian Vovuh 2018-07-15 01:57:14 59
en3 English Vovuh 2018-07-15 01:57:02 59
en2 English Vovuh 2018-07-15 01:56:25 11 Tiny change: 'time:1006] will start. You will' -> 'time:1006]. You will'
en1 English Vovuh 2018-07-15 01:56:07 2391 Initial revision for English translation (saved to drafts)
ru2 Russian Vovuh 2018-07-15 01:39:35 2 Мелкая правка: 'тупим.\n\n[contest_t' -> 'тупим.\n\nВ [contest_t'
ru1 Russian Vovuh 2018-07-15 01:39:12 2326 Первая редакция (сохранено в черновиках)