How to reach us

CAB ETH Zurich


You can send Letters, parcels or fan mail to our postal address:

Swiss Olympiad in Informatics
ETH Zürich, CAB F15.1
Universitätstr. 6
CH-8092 Zürich


If you prefer it simpler, faster and cheaper you can send us an email to

SOI Twitter

Facebook, Twitter, Instagram

We have a Facebook page, where we will post news regarding the contest. You can also find us on Instagram and Twitter.


We are on Reddit as well. You can ask us questions, give feedback or discuss with other participants. Of course we will look into it often and answer questions and help with problems.

If you don’t know Reddit: Reddit is like a bulletin board, wher you can post text entries (e.g. a question) or link entries (e.g. a cool problem you found and want to share with the other participants). Each user can comment and vote on those entries and other comments.