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 1995

The 7th International Olympiad in Informatics was held in Eindhoven, The Netherlands in 1995. There were two competition days, with 3 tasks given to the competitors on each day. You can see the tasks, solutions and tests below.

Day 1:
      Packing Rectangles
      Shopping Offers
      Printing

Day 2:
      Letter Game
      Street Race
      Wires and Switches

Other materials:
      Solution to Packing Rectangles
      Solution to Letter Game
      Solution to Street Race
      Solution to Wires and Switches
      All test data


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.