Codeforces Round #538 (Div. 2)
Difference between en11 and en12, changed 886 character(s)
**TREMBLE BEFORE THE MIGHTY OMEGALULGRAPE**↵

![ ](https://i.imgur.com/kpS7NEq.png)↵

Hello Codeforces!↵

We are honored to invite you to Codeforces Round #538 (Div. 2), which will take place at [contest_time:1114]. The round will be rated for all Division 2 participants **(with rating less than 2100)**. Still, we warmly welcome Division 1 participants to join us out of competition.↵

You will be given **6** problems to solve in **2 hours.** The round's problems were initially prepared by Duy-Bach ~Akikaze,2019-02-05 Le, Xuan-Tung ~neko_nyaa,2019-02-05 Nguyen and Xuan-Quang ~xuanquang1999,2019-02-05 D. Nguyen.↵

**There will be an interactive problem in this round.** Learn more about interactive problems [here](https://codeforces.net/blog/entry/45307).↵

This is our first attempt in making a Codeforces round, so suggestions are much welcome to help us improve ourselves. ;)↵

We also want to thanks many friends for making this round possible:↵

- Dmitry ~_kun_,2019-02-05 Sayutin for coordinating the round, providing a neat idea on one problem and some Russian translations.↵
- Andrew ~GreenGrape,2019-02-05 Rayskiy for various suggestions on the problems, some other Russian translations, **and most importantly, peacefully submitted himself to be quarantined from pretests.** ;)↵
- Michal ~majk,2019-02-05 Svagerka for testing the round.↵
- And last but not least, Mike ~MikeMirzayanov,2019-02-05 Mirzayanov for the amazing Codeforces and Polygon platform, without which this round would never be possible :D↵

P/s: I will be at the [Discord CP Community](https://codeforces.net/blog/entry/52778) to discuss the problems after the coding phase. However, please follow the rules and don't discuss the problems during the contest by any means.↵

*Wish everyone good luck and high rating!*↵

**UPD1:** Score distribution: 500-1250-1500-2000-2000-2750↵

**UPD2:** [Editorial is published.](https://codeforces.net/blog/entry/65136)


**UPD3:** The contest is finished. I apologized for the "somewhat" weak pretests at here and there. Anyway, time to celebrate our winners ;)↵

**Official participants:**↵

1. [user:xlk200,2019-02-10]↵
2. [user:vasilescu_mihai,2019-02-10]↵
3. [user:Cinro_9baka,2019-02-10]↵
4. [user:africamonkey,2019-02-10]↵
5. [user:2019_BecameMaster,2019-02-10]↵
6. [user:cdsfcesf,2019-02-10]↵
7. [user:yww_AFO,2019-02-10]↵
8. [user:hr_tian_xia_di_2,2019-02-10]↵
9. [user:JZmster,2019-02-10]↵
10. [user:chinmay0906,2019-02-10]↵

**Div.1 + Div.2 participants:**↵

1. [user:Hazyknight,2019-02-10]↵
2. [user:tfg,2019-02-10]↵
3. [user:tempura0224,2019-02-10]↵
4. [user:xlk200,2019-02-10]↵
5. [user:sava-cska,2019-02-10]↵
6. [user:mango_lassi,2019-02-10]↵
7. [user:I_love_Tanya_Romanova,2019-02-10]↵
8. [user:ec24,2019-02-10]↵
9. [user:vasilescu_mihai,2019-02-10]↵
10. [user:Cinro_9baka,2019-02-10]

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en12 English AkiLotus 2019-02-10 20:55:52 886
en11 English AkiLotus 2019-02-10 19:10:18 80
en10 English AkiLotus 2019-02-10 16:55:01 62
en9 English AkiLotus 2019-02-08 04:32:36 46 Tiny change: 'any means.' -> 'any means.\n\n*Wish everyone good luck and high rating!*'
en8 English AkiLotus 2019-02-07 20:37:45 146
en7 English AkiLotus 2019-02-07 20:19:17 14 Tiny change: 'imgur.com/85aU6QF.png)\n\nH' -> 'imgur.com/kpS7NEq.png)\n\nH'
en6 English AkiLotus 2019-02-07 19:57:37 0 (published)
en5 English AkiLotus 2019-02-07 19:39:13 14 Tiny change: 'imgur.com/QOI4eY4.jpg)\n\nHell' -> 'imgur.com/Ru2tjgP.png)\n\nHell'
en4 English AkiLotus 2019-02-05 21:55:26 106 Tiny change: ' possible ;)\n\nP/s: I' -> ' possible :D\n\nP/s: I'
en3 English AkiLotus 2019-02-05 19:54:11 6 Tiny change: 'es Round #TBA (Div. 2),' -> 'es Round #538 (Div. 2),'
en2 English AkiLotus 2019-02-05 19:53:56 6
en1 English AkiLotus 2019-02-05 18:29:33 1842 Initial revision (saved to drafts)