Codeforces Round 1085 (Div. 1 + Div. 2)
Difference between en18 and en19, changed 0 character(s)
<center>↵
<table class="tex-tabular bordertable"↵
       style="border-left: none; border-right: none; border-top: 1px solid; border-bottom: 1px solid; border-collapse: collapse;">↵
  <tbody>↵
    <tr>↵
      <td class="tex-tabular-text-align-center"↵
          style="border-left: none; border-right: none; border-top: none; border-bottom: none;">↵
        <span class="tex-font-size-small">↵
          <span class="tex-font-style-it">↵
            <a href="https://www.youtube.com/watch?v=1bvDHAUv2ak">Gusty Garden Galaxy — Mahito Yokota, Super Mario Galaxy</a>↵
          </span>↵
        </span>↵
      </td>↵
    </tr>↵
  </tbody>↵
</table>↵
</center>↵
↵
<p style="text-align:center">↵
<img width="50%" src="/predownloaded/9f/72/9f722a2e91e0a8a38ca368e42ef6469712b196bc.png">↵
</p>↵
↵
Hello, Codeforces!↵
↵
[user:IceSerpent,2026-03-04] and I are pleased to invite you to [contest:2207] on [contest_time:2207]! While some of us will be turning our clocks an hour forward for daylight savings, our theme will turn it way back to the **2010s**. ↵
↵
You will be given $8$ problems to solve in $3$ hours. Note that some of these problems are further divided into subtasks. Some of the problems may be interactive, so please read the [guide for interactive problems](https://mirror.codeforces.com/blog/entry/45307) if you are not familiar with them. The scoring distribution will be announced soon.↵
↵
The problems of this round were authored by [user:IceSerpent,2026-03-04] and myself, [user:awang11,2026-03-05]. In addition, we would like to thank:↵
↵
- [user:244mhq,2026-03-04] for his excellent coordination of the round and translating the problems to Russian;↵
↵
- [user:Um_nik,2026-03-05] for pre-reviewing the round;↵
↵
- [user:flummoxedfeline,2026-03-05] for providing beautiful illustrations;↵
↵
- our army of testers, for their invaluable feedback and eagerness to testsolve: [user:Um_nik,2026-03-04], [user:shcal,2026-03-04], [user:awesomeguy856,2026-03-04], [user:Extile,2026-03-04], [user:Noobish_Monk,2026-03-04], [user:__baozii__,2026-03-04], [user:Amazed,2026-03-04], [user:SomethingNew,2026-03-04], [user:awoo,2026-03-04], [user:-firefly-,2026-03-04], [user:ink31930,2026-03-04], [user:nik_exists,2026-03-04], [user:chromate00,2026-03-04], [user:cduckling,2026-03-04], [user:madlogic,2026-03-04], [user:Hori,2026-03-04], [user:misteg168,2026-03-04], [user:Dominater069,2026-03-04];↵
↵
- and of course [user:MikeMirzayanov,2026-03-04] and [user:KAN,2026-03-05] for the Codeforces and Polygon platforms.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en23 English awang11 2026-03-08 23:41:28 767 Tiny change: 'UPD 3:** Top 10 and first clears!\n\n**Di' -> 'UPD 3:** The results!\n\n**Di'
en22 English awang11 2026-03-08 20:37:20 109
en21 English awang11 2026-03-06 04:03:05 68
en20 English awang11 2026-03-05 22:28:15 1014 Tiny change: '\ \ \ \ \ $\n<img wi' -> '\ \ \ \ \ \,$\n<img wi'
en19 English awang11 2026-03-05 17:36:22 0 (published)
en18 English awang11 2026-03-05 17:34:56 977 Tiny change: '26-03-04] for the ' -> '26-03-04] and [user:KAN] for the '
en17 English awang11 2026-03-05 15:47:09 8
en16 English awang11 2026-03-05 15:38:01 7 Tiny change: 'given $8$ or $9$ problems' -> 'given $8$ problems'
en15 English awang11 2026-03-05 04:54:23 2 Tiny change: ' 3750 - (3250 + 750 + ' -> ' 3750 - (3500 + 750 + '
en14 English awang11 2026-03-05 04:54:02 8 Tiny change: 'e.png">$\ \,$\n<img wi' -> 'e.png">$\ $\n<img wi'
en13 English awang11 2026-03-05 04:45:56 1913
en12 English awang11 2026-03-05 04:45:25 351 Tiny change: 'ng">$\quad \ \ ' -> 'ng">$\quad\quad \ \ '
en11 English awang11 2026-03-05 04:32:48 336 Tiny change: 'mg width="6%" src="/p' -> 'mg width="5%" src="/p'
en10 English awang11 2026-03-05 04:21:07 110 Tiny change: '6e5e.png">\n<img wid' -> '6e5e.png">$\ \ \ \,$\n<img wid'
en9 English awang11 2026-03-05 04:15:10 291 Tiny change: 'mg width="25%" src="/p' -> 'mg width="50%" src="/p'
en8 English awang11 2026-03-05 03:53:29 27 Tiny change: 'and myself. In addit' -> 'and myself, [user:awang11]. In addit'
en7 English awang11 2026-03-05 03:53:01 25 Tiny change: 'tribution is as follows:\n\nThe pr' -> 'tribution will be announced soon.\n\nThe pr'
en6 English awang11 2026-03-05 03:51:39 549 Tiny change: 'e given $8 - 9$ problem' -> 'e given $8$ or $9$ problem'
en5 English awang11 2026-03-05 03:47:06 124 Tiny change: 'mg width="25%" src="/p' -> 'mg width="50%" src="/p'
en4 English awang11 2026-03-05 03:44:21 293
en3 English awang11 2026-03-04 22:47:13 62
en2 English awang11 2026-03-04 22:45:41 55
en1 English awang11 2026-03-04 18:54:00 2494 Initial revision (saved to drafts)