Hi everyone,

We are starting the call for tasks to the Ukrainian Olympiad in Informatics 2024. We need tasks of various difficulties. We do pay for the tasks.

The tasks from the previous year can be found here (day1, day2).

Please submit the problems to Barichek via Codeforces or to his telegram. The deadline is the 29-th of February.

Regards,

Leader of Ukraine at IOI

Anton Tsypko

On April 11 and 12 the Ukrainian Olympiad in Informatics 2023 took place. Because of the war, the Olympiad took place in the regional centers of Ukraine and in Warsaw.

The problems were created by RomaWhite, BigBag, Barichek, antontrygubO_o, I_LOVE_ANTON_DONBASS, Denisov, VladProg, Grogu, TheScrasse, bortoz, Kaey, andr1y

The mirror will take place on April 15 and 16. It will start at 11 AM Kyiv time. You can choose any 5-hour window to participate. The problems will be available in Ukrainian and English. Everyone is welcome to participate (except for the participants from the terrorist state).

The link to the first round: uoi2023-1.eolymp.io

The link to the second round: uoi2023-2.eolymp.io

The results of the mirror contest are available here. The original results are available here.

The EJOI 2022 Practice Round is now available with free registration on Eolymp.

In order to introduce the system to the EJOI participants, we have uploaded previous EJOI problems to our system. All the links are available below.

For 2017, 2020, and 2021, the participants can read the problems in their native language (if the problems were translated to that language that year).

According to the EJOI rules, only C++ is supported.

The first two links are for the virtual contests. Participants can start the contest, and the timer for 4 hours will start. They will be able to submit their solutions only during that time. This is something similar to USACO style. In the third contest, you can upsolve problems as long as you want.

The results of all contests is available here, and the results of upsolving here.

In 2019, with the support of XTX Markets, 6 rounds of the new Codeforces Global Rounds were held. Each round was common for both divisions and had 7–9 problems. The duration of the rounds was 2-3 hours, depending on the number and complexity of the problems. All such rounds were rated for all participants. At each such round, 50 brand T-shirts were handed out, and we gave T-shirts to all authors and problem testers as well.

The prizes for the 6-round series in 2019:

• In each round, top-100 participants get points according to the table.
• The final result for each participant is equal to the sum of points he gets in the four rounds he placed the highest.
• The best 20 participants over all series get sweatshirts and place certificates.

Final results:

Hi everyone,

I am happy to announce that the 2019 Southeastern Europe Regional Contest will take place on October 19 in Bucharest and Vinnytsia at 10 am UTC+3. The link to the live results will be published here after the start of the competition.

Moreover, in the following day, there will be the Grand Prix of Southeastern Europe based on these problems at 8 am UTC. If you do not participate in it, you will be able to take part in online mirror, which will be available at the same time.

Because of the Grand Prix, we are asking the official contestants not to discuss the problems in public.

After it, we will upload the contest to the gym and publish the editorial.

Good luck!

UPD. SEERC standings.

UPD2. Congratulations to the winners!

UPD3. Online mirror will be available here. PS. You should join the group first. The mirror will start after the Open Cup.

UPD4. Editorial is here.

UPD5. The contest is available in the gym.

In 2019, with the support of XTX Markets, 6 rounds of the new Codeforces Global Rounds will be held. These will be common rounds for both divisions of 7–9 problems each. The duration of the rounds will be 2-3 hours, depending on the number and complexity of the problems. All such rounds will be rated for all participants. At each such round, 50 brand T-shirts will be handed out, and we will be happy to give T-shirts to all authors and problem testers.

The prizes for the 6-round series in 2019:

• In each round top-100 participants get points according to the table.
• The final result for each participant is equal to the sum of points he gets in the four rounds he placed the highest.
• The best 20 participants over all series get sweatshirts and place certificates.

Current standings after five rounds:

Добрый день!

В 06.10.2019 18:05 (Московское время) состоится Отборочный Раунд 1 олимпиады для школьников Технокубок 2020. Раунд будет длиться два часа, участникам будут предложены 7 задач. По его результатам лучшие участники (но не более 45% от общего числа участников раунда) будут приглашены на финальный этап в Москву. Для регистрации на раунд и участия перейдите по ссылке. Не забудьте заранее зарегистрироваться на раунд! Для опоздавших будет открыта дополнительная регистрация.

Зарегистрироваться на Отборочный Раунд 1 →
Соревнование открыто для всех в виде отдельных раундов для первого и второго дивизионов.
Для всех участников всех трех редакций этого соревнования будет пересчитан рейтинг.

Параллельно с Отборочным Раундом будут проведены открытые рейтинговые раунды для обоих дивизионов, в них могут принять участие все желающие.

Напомним, что согласно правилам раундов Codeforces во время соревнования ваши решения будут тестироваться только на претестах (предварительном и неполном наборе тестов), а системное тестирование состоится после окончания раунда. Обратите внимание, что претесты не покрывают все возможные случаи входных данных, поэтому тщательно тестируйте свои программы! После прохождения претестов у вас будет возможность заблокировать решение, тем самым получив привилегию искать ошибки и взламывать чужие решения, но отказавшись от возможности перепослать ваше решение при каких-либо обстоятельствах (например, даже если вы найдете ошибку или вас взломают). Со временем задачи падают в стоимости. После системного тестирования учитываются только полные решения. Подробнее про правила соревнований можно прочитать по ссылкам:

• короткое описание формата
• полное описание формата

Регистрация на олимпиаду Технокубок еще открыта. Победителей и призеров олимпиады ждут значительные квоты при поступлении в престижные технические вузы России и ценные призы! Если вы — школьник 8-11 классов и пока не зарегистрировались на Технокубок, то самое время сделать это:

Зарегистрироваться на олимпиаду →
После регистрации на олимпиаду не забудьте зарегистрироваться на Отборочный Раунд!

В финал соревнования будут приглашены лучшие участники каждого из отборочных раундов (но не более 45% от общего числа участников раунда).

Авторы отборочного раунда — BledDest, MikeMirzayanov, Neon, awoo, Roms, adedalic и я. Кроме того, хочу выразить благодарность тестерам, без помощи которых этот раунд не состоялся бы: KAN, chemthan, gisp_zjz, Kallaseldor, Jeffrey, danya.smelskiy, Juve45!

In 2019, with the support of XTX Markets, 6 rounds of the new Codeforces Global Rounds will be held. These will be common rounds for both divisions of 7–9 problems each. The duration of the rounds will be 2-3 hours, depending on the number and complexity of the problems. All such rounds will be rated for all participants. At each such round, 50 brand T-shirts will be handed out, and we will be happy to give T-shirts to all authors and problem testers.

The prizes for the 6-round series in 2019:

• In each round top-100 participants get points according to the table.
• The final result for each participant is equal to the sum of points he gets in the four rounds he placed the highest.
• The best 20 participants over all series get sweatshirts and place certificates.

Current standings after four rounds: