Just finished

Due to the COVID-19 pandemic, IOI 2020 was hosted by Singapore online. Visit the official website to learn more.

Just finished   IOI 2020 was held online

Tomasz Idziaszek - Booklet with solutions of past IOI problems

Tomasz Idziaszek is involved with the competitive programming community since 2002, first as a participant in programming contests, and next as an organizer of such events. In the following video, Tomasz will describe the IOI 2018 booklet with information on all six problems from IOI 2018 - containing detailed solutions and source code; in addition to discussing the task Mechanical Doll. This booklet is incredibly useful, as most reviews and official solutions to IOI problems are quite sketchy and don't contain any source code.

The project was partially funded by the IOI, as it was selected in the recent "Call for projects" officially published on the IOI website. The actual booklet can be found here: https://ioinformatics.org/files/booklet-ioi2018.pdf

Having trouble viewing this video? Use another media server:

Need more info?


Not sure where to go? Click here to view some basic information on how to learn programming and prepare to win a medal at the IOI.


A couple of volunteers maintain a separate page with stats about people who participated at the International Olympiad in Informatics.


The IOI publishes a journal every year, with original high-quality scientific papers related to education, contests and algorithms.