Kotlin Heroes 13 Announcement Greetings Codeforces! <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:350px;float:right;margin:0 1em 1em 1em;"/> Ready to put your Kotlin skills to the test? Kotlin Heroes is your playground: a chance to experiment with the language's features, tackle fun and challenging problems, and level up your programming abilities. Perfect for beginners and experts alike! A massive shout-out to all the amazing coders who have competed in past Kotlin Heroes events: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://mirror.codeforces.com/contests/1432,1431), [Episode 6](https://mirror.codeforces.com/contests/1488,1489), [Episode 7](https://mirror.codeforces.com/contests/1533,1532), [Episode 8](https://mirror.codeforces.com/contests/1571,1570), [Episode 9](https://codeforce...

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Kotlin Heroes 12 Announcement Greetings Codeforces! <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:350px;float:right;margin:0 1em 1em 1em;"/> First things first, we would like to thank everyone who participated in the previous eleven Kotlin Heroes competitions: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://mirror.codeforces.com/contests/1432,1431), [Episode 6](https://mirror.codeforces.com/contests/1488,1489), [Episode 7](https://mirror.codeforces.com/contests/1533,1532), [Episode 8](https://mirror.codeforces.com/contests/1571,1570), [Episode 9](https://mirror.codeforces.com/contests/1911,1910), [Episode 10](https://mirror.codeforces.com/contests/1959,1958) and [Episode 11](https://mirror.codeforces.com/contests/2012,2011). Kotlin Heroes is a great way to play around with Kotlin’s features, learn somethi...

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Kotlin Heroes: Episode 4 <img src="/predownloaded/d3/f6/d3f67b5afe94939d82d9358aeb7a0edcf6a8d33f.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> 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, second and third Kotlin Heroes competitions which were held previously. Congratulations to the top 3 winners: **Episode 1** 1. [user:Petr,2020-02-26] 1. [user:ecnerwala,2020-02-26] 1. [user:eatmore,2020-02-26] **Episode 2** 1. [user:tourist,2020-02-26] 1. [user:eatmore,2020-02-26] 1. [user:Benq,2020-02-26] **Episode 3** 1. [user:Egor,2020-05-23] 1. [user:tourist,2020-05-23] 1. [user:Benq,2020-05-23] Ready to challenge yourself to do better? The fourth "Kotlin Heroes" competition will be hosted on the Codeforces platform on [contest_time:1346]. 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...

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Kotlin Heroes 11 Announcement Greetings Codeforces! <img src="/predownloaded/b1/f0/b1f072ba01f7d943562b94eca45ce6767510b284.png" style="width:400px;float:right;margin:0 1em 1em 1em;"/> First things first, we would like to thank everyone who participated in the previous nine Kotlin Heroes competitions: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://mirror.codeforces.com/contests/1432,1431), [Episode 6](https://mirror.codeforces.com/contests/1488,1489), [Episode 7](https://mirror.codeforces.com/contests/1533,1532), [Episode 8](https://mirror.codeforces.com/contests/1571,1570), [Episode 9](https://mirror.codeforces.com/contests/1911,1910), and [Episode 10](https://mirror.codeforces.com/contests/1959,1958). Kotlin Heroes is a great way to play around with Kotlin’s features, learn something new, and practice using the language by solving fun probl...

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Kotlin Heroes 14 Announcement Hello Codeforces! <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:350px;float:right;margin:0 1em 1em 1em;"/> We are happy to announce the new episode of Kotlin Heroes! It is both an opportunity to try learning a new programming language (if you've never coded in Kotlin before) or solve programming problems of very different levels of difficulty in it (if you're already familiar with Kotlin). No matter if you're a professional or a beginner, we'll be glad to see you participate! This is already the fourteenth time we conduct this competition, and the previous 13 episodes had lots of amazingly talented programmers participating. You can see for yourself by checking them out: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://codeforce...

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Kotlin Heroes 6 Announcement <img src="/predownloaded/6b/62/6b62332b37519ade4a4d42cb266937c422b64557.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> Hello, Codeforces! First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the five Kotlin Heroes competitions which were held previously: [Episode 1](https://mirror.codeforces.com/contests/1170), [Episode 2](https://mirror.codeforces.com/contests/1211), [Episode 3](https://mirror.codeforces.com/contests/1297), [Episode 4](https://mirror.codeforces.com/contests/1346), and [Episode 5: ICPC Round](https://mirror.codeforces.com/contest/1431). Ready to challenge yourself to do better? The [contest:1488] competition will be hosted on the Codeforces platform on [contest_time:1488]. 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. **Prizes:** **Top three winners will ge...

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Kotlin Heroes Episode 9 Returns! Greetings Codeforces! <img src="/predownloaded/dc/3d/dc3d601ff391e638c1f2b20ec167083978099bbe.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> We are thrilled to announce the **return of Kotlin Heroes**! As we resume this competition, we're eager both to welcome back some familiar names and meet new participants. Let's make Kotlin Heroes: Episode 9 an occasion to remember! We would like to thank everyone who participated in the previous eight Kotlin Heroes competitions: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://mirror.codeforces.com/contests/1432,1431), [Episode 6](https://mirror.codeforces.com/contests/1488,1489), [Episode 7](https://mirror.codeforces.com/contests/1533,1532), and [Episode 8](https://mirror.codeforces.com/contests/1571,1570). Kotlin Heroes is a great way to play ...

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Kotlin Heroes 10 Announcement Greetings Codeforces! <img src="/predownloaded/dc/3d/dc3d601ff391e638c1f2b20ec167083978099bbe.png" style="width:400px;float:right;margin:0 1em 1em 1em;"/> First things first, we would like to thank everyone who participated in the previous nine Kotlin Heroes competitions: [Episode 1](https://mirror.codeforces.com/contests/1170,1171), [Episode 2](https://mirror.codeforces.com/contests/1211,1212), [Episode 3](https://mirror.codeforces.com/contests/1297,1298), [Episode 4](https://mirror.codeforces.com/contests/1346,1347), [Episode 5: ICPC Round](https://mirror.codeforces.com/contests/1432,1431), [Episode 6](https://mirror.codeforces.com/contests/1488,1489), [Episode 7](https://mirror.codeforces.com/contests/1533,1532), [Episode 8](https://mirror.codeforces.com/contests/1571,1570) and [Episode 9](https://mirror.codeforces.com/contests/1911,1910). Kotlin Heroes is a great way to play around with Kotlin’s features, learn something new, and practice using the language by solving fun problems. It is great for programmers of any level! We invi...

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Kotlin Heroes 7 Announcement <img src="/predownloaded/6b/62/6b62332b37519ade4a4d42cb266937c422b64557.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> Hello, Codeforces! First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the five Kotlin Heroes competitions which were held previously: [Episode 1](https://mirror.codeforces.com/contests/1170), [Episode 2](https://mirror.codeforces.com/contests/1211), [Episode 3](https://mirror.codeforces.com/contests/1297), [Episode 4](https://mirror.codeforces.com/contests/1346), [Episode 5: ICPC Round](https://mirror.codeforces.com/contest/1431), and [Episode 6](https://mirror.codeforces.com/contest/1488). Ready to challenge yourself to do better? The [contest:1533] competition will be hosted on the Codeforces platform on [contest_time:1533]. 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 programme...

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Kotlin Heroes 8 Announcement <img src="/predownloaded/dc/3d/dc3d601ff391e638c1f2b20ec167083978099bbe.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> Hello, Codeforces! First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the seven Kotlin Heroes competitions which were held previously: [Episode 1](https://mirror.codeforces.com/contests/1170), [Episode 2](https://mirror.codeforces.com/contests/1211), [Episode 3](https://mirror.codeforces.com/contests/1297), [Episode 4](https://mirror.codeforces.com/contests/1346), [Episode 5: ICPC Round](https://mirror.codeforces.com/contest/1431), [Episode 6](https://mirror.codeforces.com/contest/1488), and [Episode 7](https://mirror.codeforces.com/contest/1533). Ready to challenge yourself to do better? The [contest:1571] competition will be hosted on the Codeforces platform on [contest_time:1571]. 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 mak...

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Kotlin Heroes 9 Announcement <img src="/predownloaded/dc/3d/dc3d601ff391e638c1f2b20ec167083978099bbe.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> **Given the current circumstances, we have decided to postpone Kotlin Heroes until further notice. Thank you for your understanding.** Hello, Codeforces! First and foremost, we would like to say a massive thank you to everyone who entered and submitted their answers to the eight Kotlin Heroes competitions which were held previously: [Episode 1](https://mirror.codeforces.com/contests/1170), [Episode 2](https://mirror.codeforces.com/contests/1211), [Episode 3](https://mirror.codeforces.com/contests/1297), [Episode 4](https://mirror.codeforces.com/contests/1346), [Episode 5: ICPC Round](https://mirror.codeforces.com/contest/1431), [Episode 6](https://mirror.codeforces.com/contest/1488), [Episode 7](https://mirror.codeforces.com/contest/1533), and [Episode 8](https://mirror.codeforces.com/contest/1571). Ready to challenge yourself to do better? The [contest:1643] competition will be hosted on the Codef...

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Kotlin Heroes 5: ICPC Round Announcement <img src="/predownloaded/62/39/62391c8471a7dc4ca0b2f2da3e7903eefd1f3dc0.png" style="width:500px;float:right;margin:0 1em 1em 1em;"/> 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, second, third, and fourth Kotlin Heroes competitions which were held previously: [Episode 1](https://mirror.codeforces.com/contests/1170), [Episode 2](https://mirror.codeforces.com/contests/1211), [Episode 3](https://mirror.codeforces.com/contests/1297) and [Episode 4](https://mirror.codeforces.com/contests/1346). Ready to challenge yourself to do better? The [contest:1431] competition will be hosted on the Codeforces platform on [contest_time:1431]. 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. **Prizes:** **Top three winners will get prizes of $512, $256, and $128 re...

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Kotlin Heroes: Episode 14 Results Hello Codeforces! [contest:2199] has wrapped up, and what an exciting round it was! Thanks to everyone who joined the contest, solved problems, and made this round another great Kotlin Heroes event. We’ve already had many amazing rounds of the Kotlin Heroes series, and it’s incredible to see the community grow with each episode. Once again, we are proud to celebrate the true heroes of Kotlin who rose to the top and earned well-deserved prizes. Top 3 contestants are: 1. [user:Golovanov399,2026-03-08] 1. [user:BucketPotato,2026-03-08] 1. [user:literalchild,2026-03-08] Kotlin Heroes T-shirts will go to the top 50 contestants: <spoiler summary="list of the winners"> 1. [user:Golovanov399,2026-03-08] 1. [user:BucketPotato,2026-03-08] 1. [user:literalchild,2026-03-08] 1. [user:__baozii__,2026-03-08] 1. [user:Sugar_fan,2026-03-08] 1. [user:arvindf232,2026-03-08] 1. [user:potato167,2026-03-08] 1. [user:Fysty,2026-03-08] 1. [user:ttamx,2026-03-08] 1. [user:maom...

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Kotlin Heroes: Episode 13 — Final Standings <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> Hello Codeforces! Kotlin Heroes: Episode 13 brought together many talented participants, and we’re excited to share the results. Massive congratulations to the coders who tackled the challenges of [contest:2141] and came out on top! Top 3 contestants are: 1. [user:tourist,2025-09-24] 1. [user:Tlatoani,2025-09-24] 1. [user:arvindf232,2025-09-24] Kotlin Heroes T-shirts will go to the top 50 contestants: <spoiler summary="list of the winners"> 1. [user:tourist,2025-09-24] 1. [user:Tlatoani,2025-09-24] 1. [user:arvindf232,2025-09-24] 1. [user:Golovanov399,2025-09-24] 1. [user:Sugar_fan,2025-09-24] 1. [user:abc864197532,2025-09-24] 1. [user:NetSpeed1,2025-09-24] 1. [user:ZAHIDUL_ISLAM_SWE,2025-09-24] 1. [user:bribritt,2025-09-24] 1. [user:Egor,2025-09-24] 1. [user:WiwiHo,2025-09-24] 1. [user:baluteshih,2025-09-24] 1. [user:errorg...

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Kotlin Heroes: Episode 12 — Meet the Winners <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> Hello Codeforces! A big round of applause to the Kotlin Heroes: Episode 12 winners! And to everyone who participated – thank you! You made this round a blast. Top 3 contestants are: 1. [user:tourist,2025-04-24] 1. [user:arvindf232,2025-04-24] 1. [user:Sugar_fan,2025-04-24] Kotlin Heroes T-shirts and keychains will go to the top 50 contestants: <spoiler summary="list of the winners"> 1. [user:tourist,2025-04-24] 1. [user:arvindf232,2025-04-24] 1. [user:Sugar_fan,2025-04-24] 1. [user:Golovanov399,2025-04-24] 1. [user:cmk666,2025-04-24] 1. [user:zjy2008,2025-04-24] 1. [user:WiwiHo,2025-04-24] 1. [user:Potassium,2025-04-24] 1. [user:Kude,2025-04-24] 1. [user:huansir,2025-04-24] 1. [user:andreyDagger,2025-04-24] 1. [user:Ra16bit,2025-04-24] 1. [user:HeartBlueArchive,2025-04-24] 1. [user:SadMachine,2025-04-24] 1. [user:baluteshi...

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Kotlin Challenge — новая олимпиада по новому языку: открываем регистрацию! Компания **JetBrains** открывает регистрацию на **Kotlin Challenge** — соревнование по программированию для тех, кто хочет попробовать новый язык программирования для платформы **Java**. Помните, на конференциях вы слышали доклады по Kotlin? Помните, кто-то из друзей вдохновенно рассказывал о том, что вот-вот появится новая Java от JetBrains? Помните, младшая сестра жаловалась, что никак не освоит Kotlin, потому что нет русской документации? Теперь все изменилось: мы начинаем свою собственную олимпиаду по Kotlin, и даже сделали немного документации по-русски для тех родных заядлых олимпиадников, которые еще не изучили даже технический английский. Мы приглашаем к участию в Kotlin Challenge всех, кто любит сложные олимпиадные задачи и всех, кто пробует самое свежее в информационных технологиях, чтобы сыграть роль первопроходцев, покоряющих неизведанный край нового языка, сразиться с серьезными соперниками и выиграть почет, славу и призы. Важно: 1. На олимпиаде допускается то...

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Kotlin Challenge: отборочные туры начинаются!  [**7 декабря с 14:00 до 16:00**](http://www.timeanddate.com/worldclock/fixedtime.html?msg=Kotlin+Challenge+%CE%BB-%D1%87%D0%B5%D1%82%D0%B2%D0%B5%D1%80%D1%82%D1%8C%D1%84%D0%B8%D0%BD%D0%B0%D0%BB&iso=20131207T14&p1=352&ah=2) и [**11 декабря с 20:00 до 22:00**](http://www.timeanddate.com/worldclock/fixedtime.html?msg=Kotlin+Challenge+%CF%80-%D1%87%D0%B5%D1%82%D0%B2%D0%B5%D1%80%D1%82%D1%8C%D1%84%D0%B8%D0%BD%D0%B0%D0%BB&iso=20131211T20&p1=352&ah=2) (время московское) проходят четвертьфиналы **Kotlin Challenge** &mdash; соревнования с правилами, которые знакомы каждому участнику ACM ICPC. Еще можно [успеть зарегистрироваться](http://kotlin.jetbrains.org/challenge/)! Решения задач должны быть на языке **Kotlin**, новом языке программирования для платформы Java, разработанном компанией **JetBrains**. Задачи готовит жюри из **НИУ ИТМО**. Это &mdash; первые отборочные туры соревнований, до сих пор были т...

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Kotlin Heroes: Episode 3 <img src="/predownloaded/d3/f6/d3f67b5afe94939d82d9358aeb7a0edcf6a8d33f.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> 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. [user:Petr,2020-02-26] 1. [user:ecnerwala,2020-02-26] 1. [user:eatmore,2020-02-26] **Episode 2** 1. [user:tourist,2020-02-26] 1. [user:eatmore,2020-02-26] 1. [user:Benq,2020-02-26] Ready to challenge yourself to do better? The third "Kotlin Heroes" competition will be hosted on the Codeforces platform on [contest_time:1297]. 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...

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Team preview: ITMO University  The last but not the least interesting team is ITMO University's team 1. ITMO has most championship titles, 5, out of 19 finals they participated in. They've got 10 Gold medals total, 1 Silver and 1 Bronze. This year team consist of 2 Bronze Medalist from 2014, Borys and Artem, and World Champion from 2013, Gennady. Team is on first place in OpenCup Standings, won numerous contest this year and universally regarded as favorite to win World Finals, are coached by Andrey Stankevich. Gennady Korotkevich (TC: 3794, CF: 3407) is one of the most honored coders ever. ACM ICPC Champion in 2013, TCO Winner in 2014, GCJ Winner in 2014, IOI Gold Medalist for a whooping 6 years (2007-2012), that's in addition to SIlver (2006) and many more achievements like Facebook Hacker Cup wins. Borys Minaiev (TC: 2760, CF: 2776) won Bronze in last year Finals, was TopCoder Open Semifin...

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Kotlin Heroes: Episode 11 Results Hello Codeforces! <img src="/predownloaded/06/ac/06ac0ca161da9600c032502a8e61c4f216557657.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> Hello Codeforces! As we wrap up another exciting round of our Kotlin Heroes series, it’s time to celebrate the champions who navigated the challenges like pros. With high stakes and impressive typing speeds, we witnessed incredible talent. Join us as we highlight the winners! The top three contestants: 1. [user:arvindf232,2024-10-28] 1. [user:tourist,2024-10-28] 1. [user:Golovanov399,2024-10-28] A Kotlin Heroes T-shirt and exclusive Kotlin stickers will be presented to: <spoiler summary="list of the winners"> 1. [user:arvindf232,2024-10-28] 1. [user:tourist,2024-10-28] 1. [user:Golovanov399,2024-10-28] 1. [user:errorgorn,2024-10-28] 1. [user:Potassium,2024-10-28] 1. [user:uwi,2024-10-28] 1. [user:wsyear,2024-10-28] 1. [user:cmk666,2024-10-28] 1. [user:LeoPro,2024-10-28] 1. [user:abc864197532,2024-10-28] 1....

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Kotlin Heroes: Episode 2 <img src="/predownloaded/d3/f6/d3f67b5afe94939d82d9358aeb7a0edcf6a8d33f.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> 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 [user:Petr,2019-08-28], [user:ecnerwala,2019-08-28], and [user:abacabadabacaba,2019-08-28] 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 <a href="https://www.timeanddate.com/worldclock/fixedtime.html?day=7&month=9&year=2019&hour=17&min=35&...

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Kotlin Heroes: Episode 10 Results Hello Codeforces! <img src="/predownloaded/dc/3d/dc3d601ff391e638c1f2b20ec167083978099bbe.png" style="width:300px;float:right;margin:0 1em 1em 1em;"/> We've already had ten great rounds – how cool is that? We are pleased to congratulate the real heroes of Kotlin, who won prizes this time. The top three contestants: 1. [user:arvindf232,2024-08-06] 1. [user:tourist,2024-08-06] 1. [user:Golovanov399,2024-08-06] A Kotlin Heroes T-shirt and exclusive Kotlin stickers will be presented to: <spoiler summary="list of the winners"> 1. [user:arvindf232,2024-08-06] 1. [user:tourist,2024-08-06] 1. [user:Golovanov399,2024-08-06] 1. [user:LeoPro,2024-08-06] 1. [user:uwi,2024-08-06] 1. [user:BucketPotato,2024-08-06] 1. [user:Yu_212,2024-08-06] 1. [user:Sugar_fan,2024-08-06] 1. [user:errorgorn,2024-08-06] 1. [user:xiaowuc1,2024-08-06] 1. [user:VladProg,2024-08-06] 1. [user:pashka,2024-08-06] 1. [user:thenymphsofdelphi,2024-08-06] 1. [user:Kude,2024-08-06] 1. [user:abc...

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ACM ICPC 2014−2015, Northeastern European Regional Contest <html> <head> </head> <body> Привет всем! Мы подошли к самому ответственному и ожидаемому мероприятию, к полуфиналу Северо-восточного европейского региона ACM ICPC. Соревнование пройдет на четырех площадках: в Санкт-Петербурге, Барнауле, Ташкенте и Тбилиси. Из [1046 команд](http://neerc2014.snarknews.info/index.cgi?data=stat/qf_players&head=index&menu=index&year=2014&qf=neerc&class=neerc2014&text=NEERC), которые участвовали в 16 четвертьфинальных соревнованиях, [281 команда](http://neerc2014.snarknews.info/index.cgi?data=macros/players&menu=index&head=index&qf=neerc&class=neerc2014&year=2014&sort1=5d&sort2=6d&sort3=7d&order5=y&order6=y&hide9=y) добралась до NEERC. На главной площадке в Санкт-Петербурге будут соревноваться 102 команды, именно здесь мы ожидаем б<b>о</b>льшую часть финалистов от нашего региона. <img src="http://lh3.googleusercontent.com/-89crikfPynA/VHxhfUe7LEI/AAAAAAAAGAE/J7OhnSglbyY/w586-h846-no/IMG_1081.JPG" align="right" style="height: 580px; margin: 20px;" a...

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Kotlin Challenge — α-тренировка Уже более недели идет α-тренировка соревнования **Kotlin Challenge**. Тренировка продлится до 15 ноября 2013 года, а на следующий день — 16 ноября с 12:00 до 14:00 состоится β-тренировка. Регистрация будет доступна до начала второго четвертьфинала, но тем не менее приглашаем вас попробовать написать решения на Kotlin заранее. Для тренировки мы выбрали 20 задач. Задачи A, B и C — простые задачи, с помощью которых вы сможете познакомиться с нашей системой, написать первые несколько программ на языке Kotlin. В задачах с D по J мы предлагаем вам реализовать на Kotlin стандартные алгоритмы. Мы надеемся, что на базе этих задач вы сможете лучше познакомиться с языком и увидеть, как хорошо знакомые вам алгоритмы выглядят на Kotlin. Наконец, задачи с K по T взяты с Andrew Stankevich Contest 25 — соревнования, которое было подготовлено одним из членов жюри Kotlin Challenge [user:andrewzta,2013-10-25] для студенческих сборов в Петрозаводске в 2007 году. Задачи доступны по ссылке [htt...

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Kotlin Challenge: последний шанс потренироваться!  В начале октября мы открыли регистрацию на **Kotlin Challenge**, соревнование по новому языку программирования, который разрабатывают в **JetBrains**. Напоминаем, что в эту пятницу, 15 ноября в 12:00 по московскому времени заканчивается альфа-тренировка, месячный тренировочный тур нашего соревнования. Если вы еще не решали задачи — самое время попробовать! А уже в эту субботу, **16 ноября с 12:00 по 14:00** по московскому времени пройдет двухчасовая бета-тренировка, последний шанс потренироваться перед отборочными турами, первый из которых состоится 7 декабря. Решайте задачи, зовите друзей на соревнование, выигрывайте денежные призы и признание! Расписание и прочую информацию, как всегда, можно посмотреть сайте соревнований: [kotlin.jetbrains.org/challenge](http://kotlin.jetbrains.org/challenge/). Если вы обнаружили техническую проблему на сайте соревнования или у вас остались какие-то в...

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Midnight Code Cup is here <img alt="Neapolis University Pafos" src="/predownloaded/09/67/0967c4495a0c7e09b4854a493404ed57e3fecbe2.png" style="float:right;height: 150px; margin: 10px;"/> **The Qualification round has started! Cheer for your favourite team:** https://ranker.codeforces.com/ranklist/602915 We’re excited to launch the first-ever Midnight Code Cup (MCC) — a team competition featuring an online Qualification round and a 24-hour onsite Final. Expect algorithmic challenges, optimization puzzles, cutting-edge computer science, and some just plain weird problems. It’ll be exhausting. And fun. Who are we? ----------- A team of problem solving <s>geeks</s> <s>veterans</s> enthusiasts, eager for the return of this contest format. The idea of Midnight Code Cup was born at **Recraft.AI** (AI image generation and graphic design pioneers) with huge support from **JetBrains** (creator of Kotlin, intelligent IDEs, and AI-driven developer tools) as well as **Neon** (developer-first open-source database)...

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About the Universal Cup, the Semifinals, and myself... Hey'all! This gonna be a long post, so let me put an important TLDR here first: we are going to host **The 3rd Universal Cup Semifinals**, which will take place on August 24, 2025 **online**, at [11:00 (UTC)](https://www.timeanddate.com/worldclock/fixedtime.html?msg=The+3rd+Universal+Cup+Semifinals&iso=20250824T19&p1=33&ah=5). This contest will be a part of our Finals Team Selection, which the detailed rules and announcements will be published later next week. --- Now for some extra context, if you're interested. Last week, we hosted the [last online stage](https://mirror.codeforces.com/blog/entry/143954) of The 3rd Universal Cup. After that, I posted a [feedback form](https://docs.google.com/forms/d/1g5Txhiirh_lRsvGfkYWRozu0WDDGK31IAXjB7VgeVoM/edit) on our discord server. I received lots of thoughtful responses (P.S — it's still open, so feel free to fill it out if you haven't yet!). I've read through all the feedback, and I'd like to share a few thoughts. ### On the Number...

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[Amateur Selfmade] Kotlin Heroes: Practice 12 Editorial for ABCDE > Read before: > According to what it seemed previously, the practice stage of Kotlin Heroes series contests may never be followed by official editorials and can not be submitted after it's finished. This blog aims to be an archive of problems, my corresponding ideas as well as submissions and some templates for faster Kotlin code editing later on. > All code blocks in this blog can be compiled with Kotlin only due to the contest's regulations. _Ahoj_, Codeforces! I had been absent from Codeforces along with Kotlin-only rounds for over one year thanks to my own business, but I kept waiting for the practice stage's initial return this year as I turn available for codings &mdash; the waiting eventually got paid off when [contest:2088] was back with the relieving news to be held on [contest_time:2088] and last for 7 days. This blog is to share thoughts on Kotlin the language and to archive problems as well as solutions for the contest. I hope this will help readers obtain a...

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Contests hack statistics (Number of hacks by round) Just felt like gathering some data about hacks. Parsed around ~400 last contests Probably it would be worth it to also include SFT, but whatever Educational 96 is not finished yet but also whatever Last 100 ------------------ **847** Educational Codeforces Round 96 (Rated for Div. 2) **30** Codeforces Global Round 11 **248** Codeforces Round #674 (Div. 3) **0** 2020 ICPC, COMPFEST 12, Indonesia Multi-Provincial Contest (Unrated, Online Mirror, ICPC Rules, Teams Preferred) **97** Bubble Cup 13 &mdash; Finals [Online Mirror, unrated, Div. 2] **86** Bubble Cup 13 &mdash; Finals [Online Mirror, unrated, Div. 1] **20** Codeforces Round #675 (Div. 2) **1** Codeforces Round #672 (Div. 2) **70** Codeforces Round #671 (Div. 2) **58** Educational Codeforces Round 95 (Rated for Div. 2) **3** Codeforces Round #673 (Div. 2) **11** Codeforces Round #673 (Div. 1) **73** Codeforces Round #667 (Div. 3) **121** Grakn Forces 2020 **4** Co...

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Codeforces Round #217 (Div. 2) _Please take a notice that recently the schedule has been changed. Twice._ Greetings to the Codeforces community! I'm glad to announce that we again decided to introduce a round based on one of the programming olympiads for schoolchildren in Saratov. This time it is a round for participants from Division II. Round will start at unusual time for Codeforces: [**Dec. 7, 07:00 UTC**](http://timeanddate.com/worldclock/fixedtime.html?day=7&month=12&year=2013&hour=11&min=0&sec=0&p1=166). The problems were prepared by employees and students of Programming Competitions Training Center of Saratov State U. Members of the first division can participate out of competition, as usual. Currently we are planning to use dynamic scoring system. UPD: Moved from 09:00 to 07:00 because of [Kotlin Challenge](http://kotlin.jetbrains.org/challenge/). UPD 2: <a href="/blog/entry/9866">Tutorial has been published.</a>

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About Codeforce's queue and upcoming div.4 Just out of curiousity. So as I have noticed,Codeforces will be holding three competitions at the same time about 25 hrs later.(ICPC Challenge powered by Huawei,Kotlin Heroes and upcoming div.4) So far,the judging system have already shown signs of significant lag.I've been suffering from 5 minute pending queue for quite a while. Now,since the div.4 is the most participated round in codeforces,that will certainly bring more lag and longer queue to the server.So I now wonder whether the admins have some backup plans about this judging surge or just extend the round to digest the long queue.

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Unable to View Other Contestants Submissions Recently, Codeforces removed older versions of some languages, such as Kotlin 1.6, Java 11, and Java 17, leading to the exclusion of submissions made in these languages. If someone using Kotlin/Java solves an old problem, they can no longer view the accepted solutions in the removed version of that language in the status tab, as there is no option to select that specific version of Java/Kotlin. For more challenging problems, there were 5-10 submissions in each version, and now these submissions are no longer visible. It is humanly impossible to see the submission language of each participant in the standings and find people who solved the problem using that version of language. e.g If someone is unable to solve any problem in kotlin he would be unable to see the accepted solutions in kotlin 1.6 and majority of the submissions were in this version itself. Is there any way for me to view all Java 11/17 accepted submissions for a problem of a past contest?

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Constructor Open Cup 2025 Greetings Codeforces community! <center> <img alt="CU" src="https://mirror.codeforces.com/predownloaded/4e/cc/4eccbe7e5a7a882f284a781ee90955551b4de165.png" style="float:right; height: 250px; margin: 10px; max-width:50%;"/> </center> We are excited to announce the **Constructor Open Cup 2025**, our annual online programming competition organized by Constructor University and JetBrains. **<u><font color="#008ce3">What is the Constructor Open Cup 2025?</font></u>** Constructor Open Cup is an online contest organized by **Constructor University** and **JetBrains**, the global leading tool provider for developers, to promote interest in computer science, data science, software development, and software engineering. Put your knowledge and skills to the test in this 4-hour competition and stand a chance to walk away with a scholarship for a bachelor's degree in Software, Data and Technology (BSc SDT) at Constructor University, Germany’s #1 private university*! **<u><font color="#...

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Kotlin Challenge Onsite (standings) [Текущие результаты финала Kotlin Challenge](http://kotlin2014.snarknews.info/index.cgi?data=kotlin/2014/finres&year=2014&contest=kotlin&class=kotlin2014)

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Constructor Open Cup 2023 Greetings Codeforces community! <center> <img alt="CU" src="https://mirror.codeforces.com/predownloaded/6f/7b/6f7bd7743d6846cfe3b792a194a5eafa53797a66.jpg" style="float:right; height: 250px; margin: 10px; max-width:50%;"/> </center> We are excited to announce the **Constructor Open Cup 2023**, our annual online programming competition organized by Constructor University and JetBrains. **<font color="#008ce3">What is the Constructor Open Cup 2023?</font>** Constructor Open Cup is an online contest organized by Constructor University and JetBrains, the global leading tool provider for developers, to promote interest in computer science, data science, software development, and software engineering. You'll have to race against the clock to solve real-life programming challenges. Put your knowledge and skills to the test in this 4-hour competition and stand a chance to walk away with a **scholarship** for the Bachelor's degree in Data Science and Software Development at Const...

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Constructor Open Cup 2024 Greetings Codeforces community! <center> <img alt="CU" src="https://mirror.codeforces.com/predownloaded/6f/7b/6f7bd7743d6846cfe3b792a194a5eafa53797a66.jpg" style="float:right; height: 250px; margin: 10px; max-width:50%;"/> </center> We are excited to announce the **Constructor Open Cup 2024**, our annual online programming competition organized by Constructor University and JetBrains. **<u><font color="#008ce3">What is the Constructor Open Cup 2023?</font></u>** Constructor Open Cup is an online contest organized by **Constructor University** and **JetBrains**, the global leading tool provider for developers, to promote interest in computer science, data science, software development, and software engineering. Put your knowledge and skills to the test in this 4-hour competition and stand a chance to walk away with a scholarship for a bachelor's degree in Software, Data and Technology (BSc SDT) at Constructor University, Germany’s #1 private university*! **<u><font color="#...

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Motivated Coder Motivated Coder ================== Hi, I am a **Mobile Developer** and **Mobile Game Developer**. This is **my very first blog** post. Today, my friend asked me why I continue to work on my projects without earning any income and how I stay motivated to code for fun. That’s why I decided to share with all of you how I find the motivation to keep coding. First, I want to highlight some of my achievements: ------------------ - **In 2022**, I achieved a **HEART STREAK** (see image below).  - **In 2023**, I somehow earned an **Expert** title without participating in many contests (disregard my **2,500** problems solved, _**haha**_). - **In 2024**, I realized I had solved more problems on this site than many others. - **In 2025**, I released my first mobile game on the App Store and Google Play. Second, I’d like to share how I use this site and motivate myself to code every day: ------------------ - T...

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AlgoAtlas Update: We're Back & Stronger After Epic Community Response! **Hello again, Codeforces community!** First off, WOW! The response to [AlgoAtlas](http://algoatlas.tech) has been absolutely overwhelming—in the best and most challenging ways possible. Our compiler servers practically melted from all your test submissions! **What Happened?** Our initial launch post generated far more interest than we anticipated (thank you!), and our compiler infrastructure couldn't handle the sudden traffic surge. Many of you experienced timeouts or slow performance—I sincerely apologize for that frustration. **Good News: We've Fixed It!** I'm excited to announce that AlgoAtlas is back online with: - Completely rebuilt compiler infrastructure capable of handling 10x more concurrent users - Optimized execution pipeline with significantly faster response times - Enhanced reliability with auto-scaling capabilities to handle traffic spikes New Features Just Added: **AI Code Analyzer** 1. Deep analysis of your algorithmic approach (not just syntax...

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AlgoAtlas Compiler Just Got 10x Better — Now With 14 Languages! Hello Codeforces enthusiasts! Following your incredible feedback and requests, I'm thrilled to announce a major upgrade to the AlgoAtlas compiler system. We've expanded from just a few languages to a comprehensive suite of **14 programming languages**, all configured specifically for competitive programming needs! New Languages Added: - C - Rust - Go - Ruby - Kotlin - Swift - PHP - TypeScript - Scala - C# These join our existing support for C++, Python, and Java — giving you unprecedented flexibility in how you approach competitive programming challenges. What makes this update special: Competitive Programming Optimized Every language comes with: - Pre-configured templates optimized for CP workflows - Proper imports/includes already set up - Main function/entry point ready to go - Standard competitive programming boilerplate C++ Template Improvements Our C++ template is now supercharged with: - bits/stdc++.h inclusion - ios::sync_with_stdio(0) ...

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Кафедра КТ. О нас. Привет! Вот краткое описание [жизни на кафедре КТ](https://vk.com/ct_ifmo). Мы постарались собрать для вас все плюсы и минусы обучения здесь. ### Плюсы - Получать актуальные знания и изучать полезные дисциплины - Заниматься в дружелюбной и конкурентной среде - Работать над научными проектами (с 1 курса) - Довести английский язык до upper-intermediate (и даже выше) - Получать стипендию выше прожиточного минимума почти в полтора раза - Все занятия в одном месте - Построить полезные контакты с нужными людьми - Ездить по миру: на соревнования по информатике и математике, научные конференции, стажировки, хакатоны - Принимать участие в организации международных мероприятий - Жить в культурном центре Санкт-Петербурга на Петроградке за 400 руб./мес. (или за 2500 руб./мес.) - Пешком ходить в универ из общежития - Активно заниматься спортом на любом уровне (от начального до профессионального) - Еда хорошего качества в столовой и три отличные булочные неподалеку - Можно пе...

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