Автор adamant, история, 6 недель назад, По-английски

Hi everyone!

I'm posting this on behalf of CP-Algorithms, a community project that started off in 2014 by RodionGork as a translation of e-maxx, a Russian go-to resource at the time by e-maxx for learning core competitive programming algorithms. Since then, CP-Algorithms grew quite a lot (which also prompted a rename from original project name e-maxx-eng) and includes a lot of new, original articles, and a lot of translated articles were enhanced and/or extended or even completely rewritten, amounting to a total of 157 articles at the moment.

At the moment, the project is largely maintained by Jakube and adamant (that's me), but as it happens, we don't have as much time to dedicate to it as we used to, so we're looking for some fresh blood to join the effort. This means both potential contributors and maintainers.

Contributors

As a community project, it is largely driven by volunteering efforts of people who write and translate articles. Moreover, similar to previous years, right about now DigitalOcean is conducting Hacktoberfest, an initiative that will award every participant which will make 4 approved pull requests on Github (in participating projects) during the month of October with a cool, free shirt

UPD: sorry, it's just a digital badge on holopin instead of t-shirts starting last year ☹️

Our project participates in Hacktoberfest, so it could be an easy way for you to contribute into open source and get a t-shirt for it. Not sure what to help us with? Consider the following:

  • GitHub issues marked with "bug" or "enhancement" tags;
  • Translation progress indicates which articles still need to be translated;
  • Write a new article on the topic of your liking or from a "new-article-suggestion" tags in GitHub issues;
  • Improve old articles (fix typos, grammar, style, etc);
  • Add images (make sure they're your original work, or adhere to image's license!).

See How to Contribute page for some instructions, or just click on a pencil icon in the upper-right corner of any article to propose changes. You can also use the Article Preview page to see how your changes will look like when they're actually added to the site. If you still have any questions about the process, don't hesitate to reach out to me directly 😊

Maintainers

Besides regular contributors, we're in dire need of having more people joining the maintainer team. You would be granted a right to contribute to the project directly without prior approval, and will need to exercise it appropriately, both when making your own contributions and when reviewing open issues and pull requests that you will be able to merge into the main branch once you think they're good enough.

On top of it, some time ago I started out a competitive programming library with automatic verification via Library Checker as an auxiliary project to CP-Algorithms. Ideally, I would like to let more people join it in the future, and also facilitate its integration into the main website and its articles somehow. Having another motivated maintainer to discuss it and work on it together would be fantastic!

Please reach out to me or Jakob if you're interested, and let us know of any of your prior experience in technical writing, computer science and competitive programming. We will be happy to expand our team!

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Автор Yandex, история, 6 недель назад, По-русски

Hello Codeforces!


We are delighted to invite you to participate in Yandex Cup 2024!
Yandex Cup is a championship in six different tracks:

This year, as a pilot project, we are inviting schoolchildren (so far only from Russia) to participate in the Algorithm and Analytics tracks.


The championship consists of three stages.

Schedule

The stages and dates are different for Machine Learning and Mobile Development. More details about the terms and conditions can be found on the track's pages.

REGISTER

Qualification is a contest with a virtual start. You can write a context during the week from 14 to 20 October. The duration depends on the selected track. After the qualification stage we will publish the criteria for the semifinal.

Semifinal will be held on 3 November. The start of the contests is at 12:00 (GMT+3) and at 17:00(GMT+3) at the Algorithm track. Duration depends on the selected track. The top 20 semi-finalists in each track and the top 10 students in the tracks Algorithm and Analytics will qualify for the finals

The final of the competition will be held in Tashkent Uzbekistan on 2-6 December. All expenses related to travel and accommodation of the finalists will be covered by us.

This year, we have also increased the prize fund, which amounts to 12.5 million rubles

See you at the Yandex Cup!

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Автор ArvinCiu, 7 недель назад, По-английски

logo

Halo, Codeforces! Ape kabar kitak? Nyi deu sit bau maang? 😍 😍

COMPFEST 16 is happy to invite you to participate in Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) on Oct/06/2024 09:05 (Moscow time). The round will be rated. You will be given 2 hours to solve 5 problems, 2 of them will have subtasks.

Note the unusual time of the round.

The problems are written by ArvinCiu, CyberSleeper, athin, and joelgun14.

We would like to thank:

COMPFEST itself is an annual event hosted by Universitas Indonesia. It is the largest student-run IT event in Indonesia and competitive programming contest is one of the competitions hosted.

We hope you will enjoy and have fun in the contest. Muga-muga beja lan isa entuk biji apik!! 💪💪🔥🔥

Edit 1: Score distribution is $$$500 - 750 - (750+1000) - 2500 - (1750 + 750 + 1000)$$$

Edit 2:

Congratulations to the winners!

Div.2 :

  1. Xun_Xiaoyao

  2. Traumatize

  3. TurtleZW

  4. wullaaa

  5. cpy0512

Div.1 + Div.2:

  1. ecnerwala

  2. tourist

  3. ksun48

  4. StarSilk

  5. kotatsugame

Congratulations also to the first solvers!

COMPFEST team and participants

On behalf of the COMPFEST committees, we are glad that our Codeforces Round ran quite smoothly and we hope that you all enjoyed our problems. See you next year! 😍 😍

Edit 3: The editorial is up!

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Автор BledDest, 2 месяца назад, По-английски

Greetings Codeforces!

First things first, we would like to thank everyone who participated in the previous nine Kotlin Heroes competitions: Episode 1, Episode 2, Episode 3, Episode 4, Episode 5: ICPC Round, Episode 6, Episode 7, Episode 8, Episode 9, and Episode 10.

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 invite you to join the practice round, where you can improve your algorithmic problem-solving skills and complete training problems. In this round, all the solutions are open and you can request hints if you’re stuck.

Watch tourist and ecnerwala tackle the Kotlin Heroes practice round challenges at the ICPC World Finals in Astana.

Here are some things you can do to help you refresh your knowledge of Kotlin and learn more about competitive programming while you practice:

On September 30, 2024, the real challenge begins! Kotlin Heroes: Episode 11 will last 2 hours 30 minutes and will feature a set of problems ranging from simple ones, which are designed to be solvable by anyone, to some really tricky ones for seasoned competitive programmers.

Note that the usage of AI-based tools during the main contest is strictly limited. To find out the guidelines for proper AI use, what is allowed and what is prohibited, please read the post "Rule Restricting the use of AI". Improper use of AI tools during the main contest may result in disqualification.

Using automatic translation tools (including but not limited to neural networks and AI) to convert code written in other programming languages to Kotlin goes against the spirit of the competition, so it is also strictly prohibited.

REGISTER →

Prizes:

The top three winners will receive cash prizes of $512, $256, and $128 (or rewards of equivalent value), respectively. The top 50 participants will win a Kotlin Heroes T-shirt and an exclusive Kotlin sticker, and all competitors who solve at least one problem will be entered into a raffle for one of 50 Kotlin Heroes T-shirts.

Please note that we are not able to ship prizes to any country, state, province, or territory subject to comprehensive OFAC sanctions, including Belarus, Cuba, Iran, North Korea, Russia, Syria, or the Crimea, Donetsk, or Luhansk regions. To see the list of sanctioned countries and regions, please visit this page.

Best of luck to everyone!

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Автор P.V.Sekhar, история, 2 месяца назад, По-английски

Hello Codeforces!

We are thrilled to invite you to participate in Codeforces Round 976 (Div. 2) and Divide By Zero 9.0, hosted as Divide By Zero 9.0 by The Programming Club, Indian Institute of Technology Indore (IIT Indore). The contest will take place on Sep/29/2024 18:35 (Moscow time).

UPD: The contest time has been updated to Sep/29/2024 18:35 (Moscow time), which differs from the previously announced schedule. Please take note of this unusual timing and adjust your plans accordingly.

You will have 2 hours to solve 6 exciting problems.

The round will be rated for participants with a rating below 2100.

Problem Setters:

The problems for this round have been authored by nishkarsh and me.

Acknowledgements:

We would like to extend our heartfelt thanks to:

Score Distribution (Div. 2):

  • 500 — 750 — 1250 — 1500 — 2000 — 2750

We hope you enjoy the problem set and have a great time solving!

Good luck to all participants!

Update: The editorial is here

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Автор TheScrasse, история, 2 месяца назад, По-английски

Ciao, Codeforces! We're glad to invite you to take part in Codeforces Round 975 (Div. 1) and Codeforces Round 975 (Div. 2), which will start on Sep/27/2024 16:35 (Moscow time). You will be given 6 problems and 2 hours and 30 minutes to solve them in both divisions. Some problems will be divided into subtasks.

UPD: the time has been changed to Sep/27/2024 16:35 (Moscow time), which is different from the time announced before. Please note the unusual starting time.

This round is based on Italian Olympiad in Informatics (OII) 2024.

The problems were authored by lorenzoferrari, wksni and me.

We would like to thank

Score distribution:

  • Div. 1: $$$500 - 750 - 750 - 1500 - (2250 + 750) - (1500 + 1500 + 1500)$$$
  • Div. 2: $$$500 - 1000 - 1750 - 2000 - 2000 - 3000$$$

We hope you'll like the problemset!

Update 1: the editorial is here.

Update 2: congratulations to the winners!

Winners and first solves

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Автор bashkort, история, 2 месяца назад, По-русски

TL;DR: Опубликуйте интересный блог на Codeforces до 15 октября и выиграйте $800+1!

UPD: Мы решили продлить конкурс до 15 ноября!

Этот блог вдохновлен месяцем блогов на Codeforces от peltorator.

Привет всем! Прошлый конкурс помог мне тогда, когда я больше всего в этом нуждался. Так что теперь я хочу отплатить сообществу обратно — организовать Codeforces Month Of Blog Posts еще раз!

Вступление

Мое мнение о блогах совпадает с мнением peltorator'а — я большой фанат Codeforces, он почти что заменяет мне социальные сети, а блоги — одна из лучших его частей! Многие люди ждут лучшего времени для публикации своих блогов, откладывают его на потом — теперь это время пришло!

Правила и сроки

Правила просты:

1. Опубликуйте что-нибудь на Codeforces (с переводом на английский язык) не ранее 10 сентября (00:02 UTC) 2024 года. Мы ищем новые идеи / новые взгляды на темы, которые мы ещё не видели — всё на ваше усмотрение. Это может быть даже что-то вроде этого комментария! — Думаю, вы поняли идею: напишите что-нибудь креативное. Если подумать, то одним из лучших постов прошлого конкурса был, наверное, его анонс :D

2. Отправьте мне личное сообщение до 15 ноября (00:02 UTC) 2024 года со ссылкой на ваш пост на Codeforces. Я буду благодарен, если вы также включите в начало своего поста пояснение в одно предложение, объясняющее, что вы участвуете в даном конкурсе, чтобы больше людей могли узнать об этом и поучаствовать.

Призы!

Победитель получит денежный приз — 350+1 долларов! Участник, занявший второе место, получит 250 долларов! Третье место получит 150 долларов! Четвертое получит 50 долларав :)

Если вы готовы увеличить бюджет для победителей — также пишите мне в личные сообщения :D

Процесс выбора победителя пока не определен, я могу придумать два варианта: выбрать победителя самостоятельно, либо выиграет блог, набравший наибольшее количество лайков. Пишите свое мнение в комментариях

Аутро

Поехали! Надеюсь, будет хотя бы один отличный блог, так что моя инициатива не останется бесполезной :D

801$ — это не маленькая сумма, поэтому я верю в вас, сделайте что-то новое, сделайте что-то, что нужно людям!

Может быть, стоит проводить подобные конкурсы ежегодно? Что-то вроде «Codeforces Year of Blog Posts»? Пишите ваши идеи в разделе комментариев!

P.S: Загляните в LI2 Contests — бесплатный курс по информатике!

UPD1: Мой хороший друг решил дать дополнительные $200 для победителя! Он настоял на том, чтобы остаться анонимным D:

UPD2: Остался один месяц! Кроме того, давайте поблагодарим i_love_penguins за приз в $100 за третье место.

UPD3: Осталось меньше месяца! Кроме того, давайте поблагодарим orz за увеличение призового фонда на $200, которое мы решили равномерно распределить — теперь и четвертое место получит приз!.

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Автор RobinFromTheHood, история, 2 месяца назад, По-английски

Hello Codeforces!

Greetings from Nottingham, England! We are delighted to invite you to Legend of Robin Hood, a round inspired by our local folklore.

Codeforces Round 974 (Div. 3) will start on 21.09.2024 17:45 (Московское время).

You will be offered 6-8 problems with expected difficulties to compose an interesting competition for participants with ratings up to 1600. However, all of you who wish to take part and have a rating of 1600 or higher, can register for the round unofficially.

The round will be hosted by rules of educational rounds (extended ICPC). Thus, solutions will be judged on preliminary tests during the round, and after the round, it will be a 12-hour phase of open hacks. After open hacks all accepted solutions will be rejudged on successful hacks.

You will be given 6-8 problems and 2 hours and 15 minutes to solve them.

Note that the penalty for the wrong submission in this round is 10 minutes.

Remember that only the trusted participants of the third division will be included in the official standings table. As it is written by link, this is a compulsory measure for combating unsporting behavior. To qualify as a trusted participant of the third division, you must:

  • take part in at least five rated rounds (and solve at least one problem in each of them)
  • do not have a point of 1900 or higher in the rating.

Regardless of whether you are a trusted participant of the third division or not, if your rating is less than 1600, then the round will be rated for you.

Problems have been prepared by ChairmanFMao, Filikec and RobinFromTheHood.

We would like to thank:

  1. Vladosiya for brilliant coordination, and for improving all problems.

  2. 18o3, cry, ikrpprppp, pavlekn for orange testing.

  3. Axial-Tilted, raztun, vgoofficial for purple testing.

  4. Alenochka, FBI, macaquedev, Non-origination, SashaT9, umezo for blue testing.

  5. gbula, Pa_sha, 1165MOHITSINGHAL, _Hosam for Div. 3 testing :)

  6. MikeMirzayanov for Polygon and Codeforces platforms.

  7. You for participating in the round!

Good luck!

UPDATE: Editorial is out!

Image by Zmarlen with our thanks!

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Автор I_Love_Diar_Narumov, 2 месяца назад, По-русски

Good Day Codeforces!

Me, Wansur and Chalishkan are happy to invite you to take part in Codeforces Round 973 (Div. 2), which starts on 20.09.2024 17:35 (Московское время) You will be given 6 problems and 2 hours to solve them. One problem was divided into two subtasks.

The round will be rated for all participants with a rating lower than 2100.

The problems were authored by me, Wansur and Chalishkan to solve and alter them.

We would like to thank:

Score Distribution: 500 — 750 — 1250 — 2000 — 2500 — (2000 + 2000)

UPD1: Congrats to the winners!

div. 2:

  1. EmmaXII

  2. hxano

  3. Muelsyse_sep006

  4. Hexagons

  5. Trumling_hasnotime

div. 1 + div. 2:

  1. maspy

  2. arvindf232

  3. Brovko

  4. aryanc403

  5. E869120

UPD2: The Editorial is out!

It is our team on EJOI 2024 4-th from left is me, 5-th from left is Wansur

We are also very glad that ICPC 2024 will be in Astana, and we wish all participants a good tour!

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Автор ICPCNews, 2 месяца назад, По-английски

ICPC WF Astana logo

Салем Codeforces!

We are glad to invite you to follow 2024 ICPC World Finals in Astana, Kazakhstan!

This is the third ICPC World Finals to be held this year. It is the culmination of the 2023-2024 ICPC season, and we have over 140 teams competing for the title of ICPC champion. Advancing from the regional contest, 141 of the world’s strongest students teams of programmers will compete at the 48th ICPC World Championship in Astana!

2024 ICPC World Finals Astana will begin on September 19, 2024 at 11:00 (UTC+5). We are thrilled to invite you to join the live broadcast of the main event of the year in the world of sports programming!

Teams qualified to ICPC WF Astana:

Scoreboard and Problemset

Some useful links:

All available broadcasts:

MAIN RU KZ AR CN ES PT JP ID

Also, you can observe teams' monitors and web cameras on the separate broadcast before frozen hour. Sent team's hashtag to the chat to see your favorite!

Split Screen Hashtags

Follow ICPC World Finals Mirror contest of team ksun48 + Petr + KAN:

Сәттіліқ тілейміз, жақсы нәтиже көрсетулеріңізге тілектеспіз! Good luck, enjoy your time at the ICPC World Finals!

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