Invitation to TOKI Regular Open Contest #18
Difference between en4 and en5, changed 951 character(s)
Happy (late) new year Codeforces community!↵

We are excited to invite you to <b>TOKI Regular Open Contest (TROC) #18!</b>↵

Key details:↵
<ul>↵
<li>Contest links: [TLX](https://tlx.toki.id/contests/troc-18) (combined divisions)</li>↵
<li> Time: [17th January 2021, 13:05 UTC](https://www.timeanddate.com/worldclock/fixedtime.html?msg=TOKI+Regular+Open+Contest+%2318&iso=20210117T1305&ah=2) </li>↵
<li> Writer: [user:steven.novaryo,2021-01-15] [user:Zap,2021-01-15] </li>↵
<li> Duration: 2 hours </li>↵
<li> Problems: 7 </li>↵
</ul>↵
<br> Scoring distribution: <b>100 &mdash; 250 &mdash; 300 &mdash; 350 &mdash; 450 &mdash; 600 &mdash; 650 </b>↵

We would like to thank:↵
<ul>↵
<li> [user:Prabowo,2021-01-15] for <strike>admitting to be a masochist</strike> the amazing coordination of the round.</li>↵
<li> [user:hocky,2021-01-15] for <strike>showing his very long tongue</strike> helping with problem preparation.</li>↵
<li> [user:malfple,2021-01-15] and [user:markus_geger,2021-01-15] for testing the problems and giving invaluable feedback.</li>↵
<li> [user:fushar,2021-01-15] for the amazing TLX platform.</li>↵
</ul>↵

Please register to the contest, and we hope you will enjoy TROC #18!↵

P.S. we encourage you to read all problems! :)↵

<b>UPD:</b> Contest is Over!↵

Congratulations to our top 5:↵

<ol>↵
<li>[user:uwi, 202
0-11-1]</li>↵
<li>[user:neal, 2020-11-1]</li>↵
<li>[user:natsugiri, 2020-11-1]</li>↵
<li>[user:Pyqe, 2020-11-1]</li>↵
<li>[user:noimi, 2020-11-1]</li>↵
</ol>↵

Congratulations to our first solvers:↵

<ul>↵
<li>A: [user:nandonathaniel, 2020-11-1]</li>↵
<li>B: [user:Pa.Nic, 2020-11-1]</li>↵
<li>C: [user:keymoon, 2020-11-1]</li>↵
<li>D: [user:noimi, 2020-11-1]</li>↵
<li>E: [user:saketh, 2020-11-1]</li>↵
<li>F: [user:uwi, 2020-11-1]</li>↵
<li>G: [user:neal, 2020-11-1
1-01-15]</li>↵
<li>[user:neal, 2021-01-15]</li>↵
<li>[user:natsugiri, 2021-01-15]</li>↵
<li>[user:Pyqe, 2021-01-15]</li>↵
<li>[user:noimi, 2021-01-15]</li>↵
</ol>↵

Congratulations to our first solvers:↵

<ul>↵
<li>A: [user:nandonathaniel, 2021-01-15]</li>↵
<li>B: [user:Pa.Nic, 2021-01-15]</li>↵
<li>C: [user:keymoon, 2021-01-15]</li>↵
<li>D: [user:noimi, 2021-01-15]</li>↵
<li>E: [user:saketh, 2021-01-15]</li>↵
<li>F: [user:uwi, 2021-01-15]</li>↵
<li>G: [user:neal, 2021-01-15
]</li>↵
</ul>↵

Editorial is available [here](https://drive.google.com/file/d/1q4UoBbpr9AnE_6eIPxQD-gMUrYt7l4OF/view) (English version is available on page 8)↵

You can upsolve the problems [here](https://tlx.toki.id/problems/troc-18).↵

Thank you for participating and see you on the next contest!↵

P.S.(2) Did you notice an easter egg in the problemset?↵

<spoiler summary="Spoiler">↵
Problems A and D have the same solution. The only difference is their output formats.↵
This idea is made by the author himself, [user:steven.novaryo,2021-01-15].↵
</spoiler>↵

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en5 English Zap 2021-01-18 07:07:26 951
en4 English Zap 2021-01-17 18:07:51 1129
en3 English Zap 2021-01-15 12:54:15 9 Tiny change: 'blems and the invaluabl' -> 'blems and giving invaluabl'
en2 English Zap 2021-01-15 12:42:16 0 (published)
en1 English Zap 2021-01-15 12:38:51 1287 Initial revision (saved to drafts)