Just happened

IOI 2018 took place in Japan in September, 2018. More info is available on the official website.

Just happened   IOI 2018 in Japan

IOI 1996

The 8th International Olympiad in Informatics was held in Veszprém, Hungary in 1996. There were two competition days, with 3 tasks given to the competitors on each day. You can see the tasks and solutions below.

Day 1:
      A Game
      Job Processing
      Network of Schools

Day 2:
      Sorting a Three-Valued Sequence
      Longest Prefix
      Magic Squares

Other materials:
      Solutions to all problems


Note that the grading model changed at IOI'94 and beyond.
Before IOI 1994, a human evaluator would sit behind the competitor's computer and do the testing manually (enter test data through the keyboard, check the output on the screen). Starting from IOI 1994, an automatic grading process is used, with test input defined in files.

Need more info?

Beginners

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.

Statistics

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

Journal

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