Educational Codeforces Round 82 [Rated for Div. 2]
Difference between en3 and en4, changed 1,669 character(s)
Hello Codeforces!↵

On [contest_time:1303] [contest:1303] 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 extended 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:Roms,2020-02-11] Glazov, Adilbek [user:adedalic,2020-02-11] Dalabaev, Vladimir [user:Vovuh,2020-02-11] Petrov, Ivan [user:BledDest,2020-02-11] Androsov, Maksim [user:Ne0n25,2020-02-11] Mescheryakov and me. Also huge thanks to Mike [user:MikeMirzayanov,2020-02-11] Mirzayanov for great systems Polygon and Codeforces.↵

Good luck to all the participants!↵

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

<center>↵
<img alt="Hello Muscat" src="https://codeforces.com/predownloaded/39/43/39438cb087a7df2453a39ddda09e4dadd9848cf1.png" style="float:center;height: 300px; margin: 10px; max-width:50%;"/>↵
</center>↵

_Hi Codeforces!_ ↵

_This is not the last call for participation, but we’re almost there. We have extended the early bird discount deadline of [Hello Muscat ICPC Programming Bootcamp](https://icpc.harbour.space/?utm_source=codeforces&utm_medium=partners) until this Sunday, February 16th._ ↵
_Remember you can request a support letter to present to your university, employer or local companies to sponsor your participation and trip to the bootcamp._ ↵

<center style="margin:2.5em;">↵
<a href="https://icpc.harbour.space/?utm_source=codeforces&utm_medium=partners" style="text-decoration:none; font-size:18px; background-color:#523996; color:white; font-weight:bold; padding:0.5em 1em;">Register now</a>↵
</center>↵


_We would also like to remind you that if your team is going to the ICPC World Finals in Moscow this June, you can fill out the form below to see if you are eligible for a full scholarship for our Bootcamp (flights not included), and we will contact you within three days to let you know about the results._ ↵

<center style="margin:2.5em;">↵
<a href="https://docs.google.com/forms/d/e/1FAIpQLSeiEkhucSWbHYqjj792C8bCwH-WvHBDCPL85S8p_6pg22Picw/viewform?usp=sf_link" style="text-decoration:none; font-size:18px; background-color:#00796B; color:white; font-weight:bold; padding:0.5em 1em;">Fill out form</a>↵
</center>↵

**UPD:** There will be **7 problems** in the round


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:tmwilliamlin168, 2020-02-12]</td>↵
<td>7</td>↵
<td>294</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:Egor, 2020-02-12]</td>↵
<td>6</td>↵
<td>173</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:ivan100sic, 2020-02-12]</td>↵
<td>6</td>↵
<td>174</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:neal, 2020-02-12]</td>↵
<td>6</td>↵
<td>175</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:kefaa2, 2020-02-12]</td>↵
<td>6</td>↵
<td>179</td>↵
</tr>↵
</tbody>↵
</table>↵

39 successful hacks and 147 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:Muhammad_Hokimiyon, 2020-02-12]</td>↵
<td>0:01</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:icecuber, 2020-02-12]</td>↵
<td>0:04</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:MylnikovNikolay, 2020-02-12]</td>↵
<td>0:09</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:waynetuinfor, 2020-02-12]</td>↵
<td>0:11</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:Mehrdad_Sohrabi, 2020-02-12]</td>↵
<td>0:17</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:wucstdio, 2020-02-12]</td>↵
<td>1:10</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:arknave, 2020-02-12]</td>↵
<td>0:49</td>↵
</tr>↵
</tbody>↵
</table>

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en5 English pikmike 2020-02-13 19:21:31 72
ru5 Russian pikmike 2020-02-13 19:21:07 74
en4 English pikmike 2020-02-13 18:18:36 1669
ru4 Russian pikmike 2020-02-13 18:17:55 1649
en3 English pikmike 2020-02-12 16:23:26 56
ru3 Russian pikmike 2020-02-12 16:22:57 39
ru2 Russian Una_Shem 2020-02-11 18:28:22 1642 (опубликовано)
en2 English Una_Shem 2020-02-11 17:59:44 1613 (published)
en1 English pikmike 2020-02-11 17:14:40 1280 Initial revision for English translation (saved to drafts)
ru1 Russian pikmike 2020-02-11 17:11:58 1396 Первая редакция (сохранено в черновиках)