JetBrains's blog

By JetBrains, history, 7 weeks ago, translation, In English

Hello Codeforces!

The sixth round of the Kotlin Heroes series recently finished! All the rounds are available to be used for practice here: Episode 1, Episode 2, Episode 3, Episode 4, Episode 5: ICPC Round and Episode 6). Thanks to everyone who participated – you inspire us to work even harder on the problems for the next round, and we think you’re really going to like them!

Congratulations to the top three contestants:

  1. tourist
  2. Egor
  3. Tlatoani

A Kotlin Heroes t-shirt and exclusive Kotlin stickers will be presented to:

  1. tourist
  2. Egor
  3. Tlatoani
  4. eatmore
  5. uwi
  6. Benq
  7. Geothermal
  8. TadijaSebez
  9. Maripium
  10. Maksim1744
  11. pashka
  12. Heltion
  13. dalt
  14. galen_colin
  15. tabr
  16. SYury
  17. natsugiri
  18. Golovanov399
  19. Spheniscine
  20. Discombobulated
  21. Ra16bit
  22. Aidos
  23. yudedako
  24. nuip
  25. knightL
  26. golikovnik
  27. wifiiii
  28. Fortin
  29. majk
  30. WiwiHo
  31. Bench0310
  32. wu_qing
  33. Kuyan
  34. Nikitosh
  35. cjtoribio
  36. receed
  37. vadimmm
  38. SecondThread
  39. LeoPro
  40. rapira
  41. Lily
  42. nhho
  43. PavelKunyavskiy
  44. abc864197532
  45. tatyam
  46. Heart_Blue
  47. Ji_Kuai
  48. darnley
  49. Potassium
  50. 353cerega

These participants also won branded t-shirts:

  1. polingram
  2. Prateek
  3. rotavirus
  4. linjek
  5. pr3pony
  6. ostroumov
  7. harshrajani460
  8. xiaowuc1
  9. arvindf232
  10. illyakr
  11. Jetman
  12. Leksiq
  13. IceKnight1093
  14. procrastinate7
  15. man.yasakov
  16. Viktor36
  17. matvey.kazakov
  18. cmplx-xyttmt
  19. SourabhYelluru
  20. daisy_2000
  21. stanm
  22. cristian1997
  23. SerVB
  24. aaronsms
  25. chick_magnet
  26. Ditmarscehen
  27. My_password_is_qwerty123
  28. Misha_Help
  29. Sohsoh84
  30. igla
  31. ans_human
  32. mystic777
  33. __RANI
  34. staffle
  35. MissNick
  36. arpit_malhotra
  37. penad
  38. I_love_Anya_Prokopyeva
  39. son8bon
  40. RandYan
  41. adimiclaus15
  42. babkabass
  43. KKT_89
  44. nishuz
  45. BMking
  46. KEKWait
  47. Kerpoo
  48. pineapple_pasta
  49. GlobalElite
  50. aka2910

We will contact the winners soon to coordinate the delivery of your prizes!

Special thanks goes to SecondThread for streaming the solutions of the entire practice round. Check out this wonderful tutorial: https://codeforces.com/stream/203

If you are still new to Kotlin but want to give it your all in the next round, take a look at Basic Kotlin (solve Koans), Kotlin Playground, this tutorial, and these videos on competitive programming in Kotlin.

We wish you all the best and hope you enjoy coding with Kotlin!

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By JetBrains, history, 5 months ago, In English

Hello Codeforces!

One of the most memorable Kotlin rounds of this year took place just recently. More than 6.7 thousand participants have registered for it. We thank everyone for your interest in Kotlin! Everyone who took part in this round will receive a link to download a personalized online certificate within the next two weeks. Work on this has already started.

Our warm congratulations to the winners of the 1st, 2nd, and 3rd place, who receive cash prizes:

  1. tourist
  2. Benq
  3. Geothermal

A Kotlin Heroes t-shirt and exclusive Kotlin stickers will be presented to:

And also these participants won branded T-shirts:

Finally, the last, but not least, gift for today: ICPC-experience, an invitation to the Moscow World Finals 2021, all-inclusive on-site (hotel, meals, ceremonies, and swag, are included; visa, flights, transportation to the contest location is not).

And a special recognition prize from the ICPC goes to tourist.

If you are still new to Kotlin you could look into a tutorial on competitive programming in Kotlin and watch these videos on competitive programming in Kotlin. Also, all the previous Kotlin Heroes Rounds are available for practice here: Episode 1, Episode 2, Episode 3, Episode 4 and Episode 5: ICPC Round.

We wish you all the best and hope you enjoy Kotlin.

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By JetBrains, 14 months ago, In English

Hello, Codeforces!

First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the first and second Kotlin Heroes competitions which was held previously. Congratulations to the top 3 winners:

Episode 1

  1. Petr
  2. ecnerwala
  3. eatmore

Episode 2

  1. tourist
  2. eatmore
  3. Benq

Ready to challenge yourself to do better? The third "Kotlin Heroes" competition will be hosted on the Codeforces platform on Feb/27/2020 16:35 (Moscow time). The contest will last 2 hours 30 minutes and will feature a set of problems from simple ones, designed to be solvable by anyone, to hard ones, to make it interesting for seasoned competitive programmers. Top three winners will get prizes of $512, $256, and $128 respectively, top 50 will win a Kotlin Heroes t-shirt and an exclusive Kotlin badge, competitors solving at least one problem will enter into a draw for one of 50 Kotlin Heroes t-shirts.

The round will again be held in accordance with a set of slightly modified ICPC rules:

  • The round is unrated.
  • The contest will have 6-10 problems of various levels of complexity.
  • You are only allowed to use Kotlin to solve these problems.
  • Participants are ranked according to the number of correctly solved problems. Ties are resolved based on the lowest total penalty time for all problems, which is computed as follows. For each solved problem, a penalty is set to the submission time of that problem (the time since the start of the contest). An extra penalty of 10 minutes is added for each failed submission on solved problems (i.e., if you never solve the problem, you will not be penalized for trying that problem). If two participants solved the same number of problems and scored the same penalty, then those of them who had previously made the last successful submission will be given an advantage in the distribution of prizes and gifts.

Registration is already open and available via the link. It will be available until the end of the round.

REGISTER →

If you are still new to Kotlin we have prepared a tutorial on competitive programming in Kotlin and a practice round, where you can try to solve a few simple problems in Kotlin. All the solutions are open, which means that you can look at the solution even if you haven't solved the problem yet. The practice round is available by the link.

We wish you luck and hope you enjoy Kotlin.

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Announcement of Kotlin Heroes: Episode 3
 
 
 
 
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By JetBrains, 20 months ago, In English

Hello, Codeforces!

First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the first Kotlin Heroes competition which was held back in May. Congratulations to the top 3 winners Petr, ecnerwala, and eatmore on their incredible achievement, especially considering they were up against 4,500 other registrants from over 63 countries. We’d also like to give a shout out to tourist for being the only other person, outside of the top 3, to manage to solve every problem set from this round. Well done all of you!

Ready to challenge yourself to do better? The second "Kotlin Heroes" competition will be hosted on the Codeforces platform on the 7th of September, 2019, at 14:35 UTC (17:35 MSK, 07:35 PDT, 22:35 CST). The contest will last 2 hours 30 minutes and will feature a set of problems from simple ones, designed to be solvable by anyone, to hard ones, to make it interesting for seasoned competitive programmers. Top three winners will get prizes of $512, $256, and $128 respectively, top 50 will win a Kotlin Heroes t-shirt and an exclusive Kotlin badge, competitors solving at least one problem will enter into a draw for one of 50 Kotlin Heroes t-shirts.

The round will again be held in accordance with a set of slightly modified ICPC rules:

  • The round is unrated.
  • The contest will have 6-10 problems of various levels of complexity.
  • You are only allowed to use Kotlin to solve these problems.
  • Participants are ranked according to the number of correctly solved problems. Ties are resolved based on the lowest total penalty time for all problems, which is computed as follows. For each solved problem, a penalty is set to the submission time of that problem (the time since the start of the contest). An extra penalty of 10 minutes is added for each failed submission on solved problems (i.e., if you never solve the problem, you will not be penalized for trying that problem). If two participants solved the same number of problems and scored the same penalty, then those of them who had previously made the last successful submission will be given an advantage in the distribution of prizes and gifts.

Registration is already open and available via the link. It will be available until the end of the round.

REGISTER →

If you are still new to Kotlin we have prepared a tutorial on competitive programming in Kotlin and a practice round, where you can try to solve a few simple problems in Kotlin. All the solutions are open, which means that you can look at the solution even if you haven't solved the problem yet. The practice round is available by the link.

We wish you luck and hope you enjoy Kotlin.

UPD: Thank you for the participation. The editorials are published.

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Announcement of Kotlin Heroes: Episode 2
Announcement of Kotlin Heroes: Practice 2
 
 
 
 
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By JetBrains, 2 years ago, In English

Hello, Codeforces!

We are happy to announce that in partnership with Codeforces to promote Kotlin programming language we are launching a series of "Kotlin Heroes" programming contests.

Kotlin programming language was introduced by JetBrains in 2011 and reached its first stable version 1.0 in 2016. The current language version is 1.3.31. The language is focused on solving the needs of application developers in various domains. Kotlin is a statically typed language that is designed for writing concise code, with less ceremony and more substance in it, and to scale from applications of just a few lines long to multi-million-lines projects.

While not being specifically designed for competitive programming, it incidentally fits well in this domain, reducing the typical amount boilerplate that a programmer needs to write and read while working with the code almost to the level offered by dynamically-typed scripting languages, while having tooling and performance of a statically-typed language.

The first "Kotlin Heroes" competition will be hosted at Codeforces platform on May/28/2019 17:35 (Moscow time). The contest will last 2 hours 30 minutes and will feature a set of problems from simple ones, designed to be solvable by anyone, to hard ones, to make it interesting for seasoned competitive programmers. Top three winners will get prizes of $512, $256, and $128 respectively, top 50 will win a Kotlin Heroes t-shirt and an exclusive Kotlin badge, competitors solving at least one problem will enter into a draw for one of 50 Kotlin Heroes t-shirts.

The round is held in accordance with slightly modified ICPC rules:

  • The round is unrated.
  • The contest will have 6-10 problems of various levels of complexity.
  • You are only allowed to use Kotlin to solve these problems.
  • Participants are ranked according to the number of correctly solved problems.
  • Ties are resolved based on the lowest total penalty time for all problems, which is computed as follows. For each solved problem, a penalty is set to the submission time of that problem (the time since the start of the contest). An extra penalty of 10 minutes is added for each failed submission on solved problems (i.e., if you never solve the problem, you will not be penalized for trying that problem).

Registration is already open and available via the link. It will be available until the end of the round.

REGISTER →

To help you get familiar with Kotlin we have prepared a tutorial on competitive programming in Kotlin and a practice round, where you can try to solve a few simple problems in Kotlin. All solutions are open, it means that you can look at a solution even if you haven't solved a problem yet. The practice round is available by the link.

We wish you luck and hope you enjoy Kotlin.

UPD 1: Many thanks to the testers elizarov, Benq, cdkrot, nhho, ksun48. Also KAN helped a lot with suggestions to the problems. And to all the participants warm greetings from authors MikeMirzayanov, vovuh, adedalic and pashka — they invented and prepared the problems for you!

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Announcement of Kotlin Heroes: Episode 1
 
 
 
 
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