CEOI 2018 is now a part of history!
Task statements, test data, model solutions, translations and some slides with solutions can be found at https://ceoi2018.pl/tasks/
The problems were added on Szkopuł and can be solved there (unfortunately, right now only in C/C++): https://szkopul.edu.pl/p/default/problemset_eng/ceoi/2018
We uploaded some photos to our Facebook fanpage: http://fb.com/ceoi2018
And finally, CEOI 2019 will take place in Bratislava, Slovakia!