Contest
Tasks
IOI 2026 tasks are published under the Creative Commons Attribution license (CC-BY) license. Full packages are also available in the IOI task archive.
Practice Contest
The IOI 2026 practice tasks are available below:
- aplusb — A + B Queries
- bitstrings — Duplicated Binary Strings
- boringgame — Boring Game
- magic — Magic Trick
Contest Day 1
The IOI 2026 Day 1 tasks are available below:
- ballmachine — Ball Machine
- monuments — Monuments
- tiling — Tiling Game
Contest Day 2
The IOI 2026 Day 2 tasks are available below:
- classroom — Classroom Game
- magiccity — Magic City
- partition — Partition
Authors
IOI 2026 contest tasks were prepared by:
