Postponed

Due to the COVID-19 pandemic, IOI 2020 has been postponed. More info is available on the official website.

Update   IOI 2020 is postponed

IOI 1993

The 5th International Olympiad in Informatics was held in Mendoza, Argentina in 1993. You can see four of the problems below, given as separate documents in pdf format for easy reading and printing.

Problems:
      Problem 1
      Problem 2
      Problem 3
      Problem 4

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.