Just finished
Due to the COVID-19 pandemic, IOI 2020 was hosted by Singapore online. Visit the official website to learn more.
Just finished IOI 2020 was held online
IOI 2020
The 32nd International Olympiad in Informatics was held online in September 2020. 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:
Plants
Supertrees
Tickets
Day 2:
Biscuits
Mushrooms
Stations
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.