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Educational Codeforces Round 47 [Rated for Div. 2]
Difference between en2 and en3, changed 74 character(s)
Hello Codeforces!↵
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On [contest_time:1009] Educational Codeforces Round 47 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://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. 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 Ivan [user:BledDest,2018-07-13] Androsov, Vladimir [user:Vovuh,2018-07-13] Petrov, Maksim [user:Ne0n25,2018-07-13] Mescheryakov, Aslan [user:ag2cidk,2018-07-13] Tamaev and me.↵

Good luck to all participants!↵

I also have a message from our partner, [Harbour.Space University](https://harbour.space/):↵

Hi Codeforces!↵

We want to remind everyone that the [Hello Barcelona Programming Bootcamp](http://in.harbour.space/icpc/acm-icpc-hello-barcelona-bootcamp-autumn-2018?utm_source=partners&utm_medium=codeforces) is right around the corner, and we’d love to see you there!↵

Our boot camp will once again feature the all-time greats Mike [user:MikeMirzayanov,2018-07-13] Mirzayanov, Andrey [user:andrewzta,2018-07-13] Stankevich, Michael [user:Endagorion,2018-07-13] Tikhomirov, Gleb [user:GlebsHP,2018-07-13] Evstropov, Artem [user:VArtem,2018-07-13] Vasilyev, Ivan [user:ifsmirnov,2018-07-13] Smirnov and other world renowned Russian coaches to train the participants.↵

We would also like to extend a welcome to some of the newest teams to join us from **Colorado School of Mines, University of British Columbia and Reykjavík University**.↵

Be sure to [register](http://in.harbour.space/icpc/acm-icpc-hello-barcelona-bootcamp-autumn-2018?utm_source=partners&utm_medium=codeforces) before **August 1st so everyone has time to get visas if needed**, and of course for the Early Bird Discount of 15% or the Loyalty Discount* of 20% off registration for the boot camp!↵

<font size=2> *The loyalty discount is offered to universities and individual participants that took part in Hello Barcelona Bootcamps and Moscow Workshops ICPC.</font>↵

[Learn more about Barcelona ICPC Bootcamp](http://in.harbour.space/icpc/acm-icpc-hello-barcelona-bootcamp-autumn-2018?utm_source=partners&utm_medium=codeforces)↵

You can ask any questions by email: hello@harbour.space↵

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:e-pluszak, 2018-07-14]</td>↵
<td>7</td>↵
<td>159</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:hohomu, 2018-07-14]</td>↵
<td>7</td>↵
<td>274</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:guille, 2018-07-14]</td>↵
<td>7</td>↵
<td>338</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:radoslav11, 2018-07-14]</td>↵
<td>7</td>↵
<td>580</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:waynetuinfor, 2018-07-14]</td>↵
<td>6</td>↵
<td>148</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:halyavin, 2018-07-14]</td>↵
<td><b><font color="green">689</font></b><b>:<font color="red">-132</font></b></td></td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:2014CAIS01, 2018-07-14]</td>↵
<td><b><font color="green">91</font></b><b>:<font color="red">-13</font></b></td></td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:Marcel_Ib, 2018-07-14]</td>↵
<td><b><font color="green">20</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:Ali_Pi, 2018-07-14]</td>↵
<td><b><font color="green">16</font></b><b>:<font color="red">-3</font></b></td></td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:20180616sG, 2018-07-14]</td>↵
<td><b><font color="green">15</font></b><b>:<font color="red">-3</font></b></td></td>↵
</tr>↵
</tbody>↵
</table>↵
978 successful hacks and 798 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:AuroraGarden, 2018-07-14]</td>↵
<td>0:01</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:eddy1021, 2018-07-14]</td>↵
<td>0:05</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:e-pluszak, 2018-07-14]</td>↵
<td>0:09</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:hmc, 2018-07-14]</td>↵
<td>0:09</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:Roundgod, 2018-07-14]</td>↵
<td>0:19</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:radoslav11, 2018-07-14]</td>↵
<td>0:15</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:chemthan, 2018-07-14]</td>↵
<td>0:28</td>↵
</tr>↵
</tbody>↵
</table>


UPD: [The editorial is posted](http://codeforces.com/blog/entry/60630)

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en3 English PikMike 2018-07-15 16:23:33 74
ru3 Russian PikMike 2018-07-15 16:19:05 69
en2 English PikMike 2018-07-15 15:09:32 2654
ru2 Russian PikMike 2018-07-15 15:09:13 2630
en1 English PikMike 2018-07-13 14:04:44 2710 Initial revision for English translation
ru1 Russian PikMike 2018-07-13 14:02:11 2887 Первая редакция (опубликовано)