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 2003

The 15th International Olympiad in Informatics was held in Kenosha, Wisconsin, USA in 2003. There were two competition days, with 3 tasks given to the competitors on each day. You can see the tasks and test cases below.

Day 1:
      Trail Maintenance
      Comparing Code
      Reverse

Day 2:
      Guess Which Cow
      Amazing Robots
      Seeing the Boundary

Other materials:
      Test cases


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.

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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.