Educational Codeforces Round 56 [Rated for Div. 2]
Difference between en4 and en5, changed 70 character(s)
Hello Codeforces!↵

On [contest_time:1093] [contest:1093] will start.↵
 ↵
Series of Educational Rounds continue being held as [Harbour.Space University](https://harbour.space/) initiative! You can read the details about the cooperation between [Harbour.Space University](https://harbour.space/) and Codeforces in the <a href="http://mirror.codeforces.com/blog/entry/51208">blog post</a>.↵
 ↵
This round will be **rated for the participants with rating lower than 2100**. It will be held on extented ACM ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.↵
 ↵
You will be given **7 problems** and **2 hours** to solve them.↵
 ↵
The problems were invented and prepared by Roman [user:Ajosteen,2018-12-14] Glazov, Adilbek [user:adedalic,2018-12-14] Dalabaev, Vladimir [user:Vovuh,2018-12-14] Petrov, Ivan [user:BledDest,2018-12-14] Androsov and me.↵

Good luck to all participants!↵

Our friends at Harbour.Space also have a message for you:↵

![ ](https://puu.sh/C8w1A/3654e46711.png)↵

Hello Codeforces!↵

We are excited to announce that the [Hello Muscat Programming Bootcamp](https://in.harbour.space/icpc/icpc-hello-muscat-bootcamp-2019/?utm_source=codeforces) registration is open! ↵
The camp will take place from March 9th to March 15th, 2019, and our early bird discount of 15% is going until December 15th!↵

This next edition in our Hello Programming Bootcamp will run in parallel with the traditional Moscow ICPC Workshop &mdash; both Bootcamps’ contests will be identical, and contestants will be able to see their position in the General Leaderboard. Every day, both camps will be competing simultaneously, 4,000 kilometers from each other!↵


<center style="margin: 20.0px;"> <a href="https://in.harbour.space/icpc/icpc-hello-muscat-bootcamp-2019/?utm_source=codeforces" style="font-size: 20.0px;padding: 7.0px 10.0px;background-color: rgb(103,58,183);color: white;">REGISTER FOR THE BOOTCAMP</a> </center>↵

Congratulations to the winners:↵
<table class='bordertable'>↵
<tbody>↵
<tr>↵
<th>Rank</th>↵
<th>Competitor</th>↵
<th>Problems Solved</th>↵
<th>Penalty</th>↵
</tr>↵
<tr>↵
<td>1</td>↵
<td>[user:waynetuinfor, 2018-12-15]</td>↵
<td>7</td>↵
<td>190</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:nuip, 2018-12-15]</td>↵
<td>7</td>↵
<td>226</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:Ali.Sh, 2018-12-15]</td>↵
<td>7</td>↵
<td>246</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:danya.smelskiy, 2018-12-15]</td>↵
<td>7</td>↵
<td>252</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:Batrr, 2018-12-15]</td>↵
<td>7</td>↵
<td>272</td>↵
</tr>↵
</tbody>↵
</table>↵


Congratulations to the best hackers:↵
<table class='bordertable'>↵
<tbody>↵
<tr>↵
<th>Rank</th>↵
<th>Competitor</th>↵
<th>Hack Count</th>↵
</tr>↵
<tr>↵
<td>1</td>↵
<td>[user:9646516, 2018-12-15]</td>↵
<td><b><font color="green">75</font></b><b>:<font color="red">-20</font></b></td></td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:interestingLSY, 2018-12-15]</td>↵
<td><b><font color="green">49</font></b><b>:<font color="red">-24</font></b></td></td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:NIKITA_BY, 2018-12-15]</td>↵
<td><b><font color="green">12</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:katana_handler, 2018-12-15]</td>↵
<td><b><font color="green">11</font></b></td></td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:marismmm, 2018-12-15]</td>↵
<td><b><font color="green">8</font></b></td></td>↵
</tr>↵
</tbody>↵
</table>↵
298 successful hacks and 565 unsuccessful hacks were made in total!↵

And finally people who were the first to solve each problem:↵
<table class='bordertable'>↵
<tbody>↵
<tr>↵
<th>Problem</th>↵
<th>Competitor</th>↵
<th>Penalty</th>↵
</tr>↵
<tr>↵
<td>A</td>↵
<td>[user:sorry_stefdasca_snsdsux, 2018-12-15]</td>↵
<td>0:01</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:anti_my_abis, 2018-12-15]</td>↵
<td>0:02</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:Golovanov399, 2018-12-15]</td>↵
<td>0:05</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:Golovanov399, 2018-12-15]</td>↵
<td>0:09</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:ko_osaga, 2018-12-15]</td>↵
<td>0:25</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:gritukan, 2018-12-15]</td>↵
<td>0:28</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:tfg, 2018-12-15]</td>↵
<td>0:09</td>↵
</tr>↵
</tbody>↵
</table>↵

**UPD:** [Editorial is out](https://mirror.codeforces.com/blog/entry/63877)

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en5 English awoo 2018-12-16 18:02:03 70
ru4 Russian awoo 2018-12-16 18:01:35 72
en4 English awoo 2018-12-16 12:34:02 2610
ru3 Russian awoo 2018-12-16 12:33:26 2586
en3 English awoo 2018-12-14 17:34:46 1046
ru2 Russian awoo 2018-12-14 17:34:27 1038
en2 English awoo 2018-12-14 11:09:33 22
en1 English awoo 2018-12-14 11:09:20 1134 Initial revision for English translation
ru1 Russian awoo 2018-12-14 11:08:15 1255 Первая редакция (опубликовано)