Educational Codeforces Round 58 [Rated for Div. 2]
Difference between en3 and en4, changed 2,674 character(s)
Hello Codeforces!↵

On [contest_time:1101] [contest:1101] 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. 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,2019-01-10] Glazov, Adilbek [user:adedalic,2019-01-10] Dalabaev, Vladimir [user:Vovuh,2019-01-10] Petrov, Ivan [user:BledDest,2019-01-10] Androsov, Grigory [user:V--gLaSsH0ldEr593--V,2019-01-11] Reznikov 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:krijgertje, 2019-01-11]</td>↵
<td>7</td>↵
<td>182</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:dreamoon_love_AA, 2019-01-11]</td>↵
<td>7</td>↵
<td>191</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:KrK, 2019-01-11]</td>↵
<td>7</td>↵
<td>196</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:TadijaSebez, 2019-01-11]</td>↵
<td>7</td>↵
<td>217</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:palayutm, 2019-01-11]</td>↵
<td>7</td>↵
<td>217</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:_bacali, 2019-01-11]</td>↵
<td><b><font color="green">457</font></b><b>:<font color="red">-133</font></b></td></td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:MarcosK, 2019-01-11]</td>↵
<td><b><font color="green">252</font></b><b>:<font color="red">-6</font></b></td></td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:nikit523, 2019-01-11]</td>↵
<td><b><font color="green">129</font></b><b>:<font color="red">-6</font></b></td></td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:greencis, 2019-01-11]</td>↵
<td><b><font color="green">139</font></b><b>:<font color="red">-29</font></b></td></td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:djm03178, 2019-01-11]</td>↵
<td><b><font color="green">68</font></b><b>:<font color="red">-3</font></b></td></td>↵
</tr>↵
</tbody>↵
</table>↵
1967 successful hacks and 1152 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:bazsi700, 2019-01-11]</td>↵
<td>0:00</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:sorry_stefdasca_snsdsux, 2019-01-11]</td>↵
<td>0:04</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:bazsi700, 2019-01-11]</td>↵
<td>0:07</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:Yuki_Matsui, 2019-01-11]</td>↵
<td>0:17</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:504, 2019-01-11]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:krijgertje, 2019-01-11]</td>↵
<td>0:48</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:RUSH_D_CAT, 2019-01-11]</td>↵
<td>0:11</td>↵
</tr>↵
</tbody>↵
</table>↵

UPD: [The editorial is out](https://codeforces.com/blog/entry/64483)

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en4 English awoo 2019-01-12 18:47:10 2674
ru4 Russian awoo 2019-01-12 18:46:44 2650
en3 English awoo 2019-01-12 18:43:41 72
ru3 Russian awoo 2019-01-12 18:43:13 70
en2 English awoo 2019-01-11 17:26:00 57
ru2 Russian awoo 2019-01-11 17:25:29 59
en1 English awoo 2019-01-10 17:03:39 1124 Initial revision for English translation
ru1 Russian awoo 2019-01-10 17:02:20 1250 Первая редакция (опубликовано)