Educational Codeforces Round 57 [Rated for Div. 2]
Разница между en3 и en4, 68 символ(ов) изменены
Hello Codeforces!↵

On [contest_time:1096] [contest:1096] 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.net/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, Soroush Tabesh [user:Soroush.T,2018-12-28] and me.↵

Good luck to all participants!↵

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:chuochuo, 2018-12-28]</td>↵
<td>7</td>↵
<td>222</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:Traxex_, 2018-12-28]</td>↵
<td>7</td>↵
<td>270</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:quailty, 2018-12-28]</td>↵
<td>7</td>↵
<td>281</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:hitman623, 2018-12-28]</td>↵
<td>7</td>↵
<td>285</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:E.Space, 2018-12-28]</td>↵
<td>7</td>↵
<td>316</td>↵
</tr>↵
</tbody>↵
</table>↵

69 successful hacks and 296 unsuccessful hacks were made in total! The table doesn't look that interesting this time, so I won't include it.↵

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:irkstepanov, 2018-12-28]</td>↵
<td>0:00</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:ChiIIi, 2018-12-28]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:Qing_Yang, 2018-12-28]</td>↵
<td>0:06</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:aleex, 2018-12-28]</td>↵
<td>0:07</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:chuochuo, 2018-12-28]</td>↵
<td>0:57</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:isaf27, 2018-12-28]</td>↵
<td>0:19</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:300iq, 2018-12-28]</td>↵
<td>0:06</td>↵
</tr>↵
</tbody>↵
</table>


UPD: [Editorial is out](https://codeforces.net/blog/entry/64156)

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
en4 Английский awoo 2018-12-29 13:46:32 68
ru4 Русский awoo 2018-12-29 13:46:02 70
en3 Английский awoo 2018-12-29 12:25:20 1709
ru3 Русский awoo 2018-12-29 12:22:34 1692
en2 Английский awoo 2018-12-28 16:04:51 44 Tiny change: '] Androsov and me.\n' -> '] Androsov, Soroush Tabesh [user:Soroush.T] and me.\n'
ru2 Русский awoo 2018-12-28 16:04:39 48
en1 Английский awoo 2018-12-27 17:25:56 1128 Initial revision for English translation
ru1 Русский awoo 2018-12-27 17:24:24 1255 Первая редакция (опубликовано)