Hello Codeforces!↵
↵
On [contest_time:1455] [contest:1455] 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 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 **6 or 7 problems** and **2 hours** to solve them.↵
↵
The problems were invented and prepared by Roman [user:Roms,2020-11-29] Glazov, Adilbek [user:adedalic,2020-11-29] Dalabaev, Vladimir [user:vovuh,2020-11-29] Petrov, Ivan [user:BledDest,2020-11-29] Androsov, Maksim [user:Ne0n25,2020-11-29] Mescheryakov and me. Also huge thanks to Mike [user:MikeMirzayanov,2020-11-29] Mirzayanov for great systems Polygon and Codeforces.↵
↵
Good luck to all the 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:neal, 2020-11-30]</td>↵
<td>7</td>↵
<td>223</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>7</td>↵
<td>224</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:tute7627, 2020-11-30]</td>↵
<td>6</td>↵
<td>190</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:CN_zwang2002, 2020-11-30]</td>↵
<td>6</td>↵
<td>195</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:noimi, 2020-11-30]</td>↵
<td>6</td>↵
<td>213</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:MarcosK, 2020-11-30]</td>↵
<td><b><font color="green">41</font></b><b>:<font color="red">-6</font></b></td></td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:dapingguo8, 2020-11-30]</td>↵
<td><b><font color="green">34</font></b><b>:<font color="red">-2</font></b></td></td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:jerdno, 2020-11-30]</td>↵
<td><b><font color="green">12</font></b><b>:<font color="red">-4</font></b></td></td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:ARTpositive, 2020-11-30]</td>↵
<td><b><font color="green">10</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:halyavin, 2020-11-30]</td>↵
<td><b><font color="green">9</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
</tbody>↵
</table>↵
357 successful hacks and 769 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:edickLPM, 2020-11-30]</td>↵
<td>0:00</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:SSRS_, 2020-11-30]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:corol, 2020-11-30]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:pajenegod, 2020-11-30]</td>↵
<td>0:08</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:neal, 2020-11-30]</td>↵
<td>0:29</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>0:55</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>1:17</td>↵
</tr>↵
</tbody>↵
</table>↵
↵
↵
**UPD:** [Editorial is out](https://mirror.codeforces.com/blog/entry/85186)
↵
On [contest_time:1455] [contest:1455] 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 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 **6 or 7 problems** and **2 hours** to solve them.↵
↵
The problems were invented and prepared by Roman [user:Roms,2020-11-29] Glazov, Adilbek [user:adedalic,2020-11-29] Dalabaev, Vladimir [user:vovuh,2020-11-29] Petrov, Ivan [user:BledDest,2020-11-29] Androsov, Maksim [user:Ne0n25,2020-11-29] Mescheryakov and me. Also huge thanks to Mike [user:MikeMirzayanov,2020-11-29] Mirzayanov for great systems Polygon and Codeforces.↵
↵
Good luck to all the 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:neal, 2020-11-30]</td>↵
<td>7</td>↵
<td>223</td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>7</td>↵
<td>224</td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:tute7627, 2020-11-30]</td>↵
<td>6</td>↵
<td>190</td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:CN_zwang2002, 2020-11-30]</td>↵
<td>6</td>↵
<td>195</td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:noimi, 2020-11-30]</td>↵
<td>6</td>↵
<td>213</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:MarcosK, 2020-11-30]</td>↵
<td><b><font color="green">41</font></b><b>:<font color="red">-6</font></b></td></td>↵
</tr>↵
<tr>↵
<td>2</td>↵
<td>[user:dapingguo8, 2020-11-30]</td>↵
<td><b><font color="green">34</font></b><b>:<font color="red">-2</font></b></td></td>↵
</tr>↵
<tr>↵
<td>3</td>↵
<td>[user:jerdno, 2020-11-30]</td>↵
<td><b><font color="green">12</font></b><b>:<font color="red">-4</font></b></td></td>↵
</tr>↵
<tr>↵
<td>4</td>↵
<td>[user:ARTpositive, 2020-11-30]</td>↵
<td><b><font color="green">10</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
<tr>↵
<td>5</td>↵
<td>[user:halyavin, 2020-11-30]</td>↵
<td><b><font color="green">9</font></b><b>:<font color="red">-1</font></b></td></td>↵
</tr>↵
</tbody>↵
</table>↵
357 successful hacks and 769 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:edickLPM, 2020-11-30]</td>↵
<td>0:00</td>↵
</tr>↵
<tr>↵
<td>B</td>↵
<td>[user:SSRS_, 2020-11-30]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>C</td>↵
<td>[user:corol, 2020-11-30]</td>↵
<td>0:03</td>↵
</tr>↵
<tr>↵
<td>D</td>↵
<td>[user:pajenegod, 2020-11-30]</td>↵
<td>0:08</td>↵
</tr>↵
<tr>↵
<td>E</td>↵
<td>[user:neal, 2020-11-30]</td>↵
<td>0:29</td>↵
</tr>↵
<tr>↵
<td>F</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>0:55</td>↵
</tr>↵
<tr>↵
<td>G</td>↵
<td>[user:jiangly, 2020-11-30]</td>↵
<td>1:17</td>↵
</tr>↵
</tbody>↵
</table>↵
↵
↵
**UPD:** [Editorial is out](https://mirror.codeforces.com/blog/entry/85186)
