Over the next six months we will organize seven online contests as a warm-up for the 2020 season of high school programming competitions. Everyone is welcome to participate! Each contest will be three hours long and will feature five tasks. The tasks will be of widely varying difficulty; we hope that many beginner or up-and-coming contestants will participate, as well as the more experienced ones.

You may use Python, Pascal, C/C++ or Java as your programming language of choice.

The two relevant websites are:
http://hsin.hr/coci/ - information about the contest
http://evaluator.hsin.hr/ - contest system

We hope that you will join us or encourage your students to do so!

This is the fourteenth year in a row that we are hosting the COCI series. You can find the tasks (statements, test data and solutions) from the previous years at http://hsin.hr/coci/. There are over 600 original tasks for students to practice on! 

With regards,
Kresimir Malnar
Croatian Computer Science Association