Swiss Olympiad in Informatics

First Round

Pick your favourite programming language and solve the tasks of the first round online.

Tasks for the contest 2023

The first round is conducted online. It starts on 15 September 2022 and ends on 30 November 2022. Everyone who satisfies the conditions of participations can participate. There are two categories: junior and regular. If you can participate this year and the following two more years, you are eligible for the junior round. The five tasks are chosen to promote creativity and good ideas – prior knowledge in programming and algorithms is useful, but not required.

Workshops

The graph lecture during the workshops.

Main page for the workshops

The workshops teach you everything you need to know to the tasks of the first round. You’ll learn about C++ and algorithmic problem solving. The workshops can be attended free of charge. No matter how much background knowledge you have, you will certainly benefit.

End of the First Round

The winners of the first round of SOI 2022

The first round ends on November 30, but SOI just started: the 2H round opens which will prepare you for the next round and the camp.

We will correct the non-feedback tasks and invite the camp participants in early December. The official results are revealed during SOI day.

Sarnen Camp

Group picture in 2018 in Ftan

The Sarnen camp is a week-long training camp for top 16 participants from the regular round, the top 8 participants of the junior round and some guest countries. There are lectures, practice tasks and training contests, but there is also ample time to meet the other participants and have lots of fun.

Second Round

Students working on the theoretical part of the second round

A total of 60 participants (20 junior, 40 regular) of the first round qualify for the second round. Participation in the SOI-Camp is not mandatory for participation in the second round.

The second round consists of three parts:

• 2T (400pts, theoretical): pen-and-paper exam written in Zurich or Lausanne.
• 2P (400pts, practical): online exam written from home.
• 2H (200pts, homework): solve some full-feedback training tasks starting from December 1st

Finals

The winners of the finals in 2022

The top 10 participants of the second round together with two selected by us are invited to the final round in Bern and Zürich. During the final round there are four practical programming contests that are held on two times two days in Bern and Zürich. In the finals and at IOI, you will not be allowed to use any language other than C++ or Python to solve the tasks.

EGOI

https://egoi.org/

The EGOI, the European Girls’ Olympiad in Informatics, is a competition where countries from all over Europe send their best female participants. The first edition was held in 2021 in Zurich. The best four female participants at the second round of this year’s Swiss Olympiad in Informatics will make up the Swiss team at EGOI.

CEOI

The Swiss delegation at CEOI 2022 in Varaždin

http://ceoi.inf.elte.hu/

The CEOI, the Central European Olympiad in informatics, is similar in style to the IOI. While smaller in scale, getting a medal is usually more difficult than at IOI.

IOI

Two bronze medals for Switzerland at IOI 2019 in Baku

IOI 2023

Over 80 nations send their 4 best students to compete in the International Olympiad in Informatics (IOI). The IOI is the most important, but not the only international event where the best participants of the SOI can meet, exchange and compete with other teenagers.