Codeforces Round #485 (div.1+div.2)

Revision en9, by Um_nik, 2018-05-30 17:05:47


I'm glad to invite you all to Round 485 which will take place on Tuesday, May 29 at 18:35 UTC+3.

There will be 6 problems in each division, 3 of them are shared between divisions. 2 of div.2 problems created by KAN, 7 others created by me. The contest duration is 2 hours. My problems were originally used in HSE Championship.

I would like to thank Merkurev and GlebsHP with whom I discussed the problems, I_love_Tanya_Romanova for testing, KAN for round coordination and Codeforces and Polygon team for these beautiful platforms. I would also like to thank HSE for organizing the event. Oh, and kb. for writing great legend for one of the problems (he will be surprised).

For those who for some reason like to know score distribution in advance:
div.2: 500 — 1000 — 1250 — 1750 — 2250 — 3000
div.1: 500 — 1000 — 1750 — 2500 — 2750 — 3000
But I didn't properly discuss it with KAN so this is subject to change :)
UPD: Discussed with KAN, scores for C and D in div.2 increased by 250.

Good fun, have problems, read all the luck. As usual.

Oh, and if there will be no bad things, round will be rated. I hope.

I'm very sorry for issues with queue. I understand that it could ruin the contest for many of you. But please be understanding. Bad things happen. It could be some network problems or some electricity problems. MikeMirzayanov, KAN and other people behind Codeforces trying their best to provide good service. But sometimes it's very hard for some reasons. I hope that you enjoyed the problems despite all the bad things.

We decided that round will be rated.

Editorial will be posted tomorrow.

div.1 winners:
1. tourist
2. Retired_MiFaFaOvO
3. Radewoosh
4. webmaster
5. LHiC

div.2 winners:
1. sminem
2. Fortza_Gabi_Tulba
3. cheburazshka
4. McDonald
5. 2ez4me

Editorial is up.

Tags round


  Rev. Lang. By When Δ Comment
en9 English Um_nik 2018-05-30 17:05:47 61
en8 English Um_nik 2018-05-30 00:50:45 975
en7 English Um_nik 2018-05-29 17:45:55 98 Tiny change: 'change :) . \nUPD: Di' -> 'change :) \nUPD: Di'
en6 English Um_nik 2018-05-29 01:00:59 1 Tiny change: 'ly discusse it with [' -> 'ly discuss it with ['
en5 English Um_nik 2018-05-29 00:12:52 1 Tiny change: 'y discussed it with [' -> 'y discusse it with ['
en4 English Um_nik 2018-05-28 17:22:02 72
en3 English Um_nik 2018-05-28 17:20:54 17 (published)
en2 English Um_nik 2018-05-28 17:02:38 112
en1 English Um_nik 2018-05-28 16:52:45 1222 Initial revision (saved to drafts)