Just finished
IOI 2024 took place in Egypt. Visit the official website to learn more.
Just finished IOI 2024 in Egypt
IOI 2021
The 33rd International Olympiad in Informatics was held online in June 2021. There were two competition days, with 3 tasks given to the competitors on each day. You can see the tasks, test cases and solutions below.
Day 1:
Candies
Keys
Parks
Day 2:
DNA
Dungeons
Registers
Other materials:
Test cases
Solutions to all problems
Practice 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.