Past Problems

Year	Regional Stage	Final Stage
2025	day 1 day 2	day 1 day 2
2024	day 1 day 2	day 1 day 2
2023	day 1 day 2	day 1 day 2
2022	day 1 day 2	day 1 day 2
2021	day 1 day 2	day 1 day 2
2020	day 1 day 2	not held
2019	day 1 day 2	day 1 day 2
2018	day 1 day 2	day 1 day 2
2017	day 1 day 2	day 1 day 2
2016	day 1 day 2	day 1 day 2
2015	day 1 day 2	day 1 day 2
2014	day 1 day 2
2013	day 1 day 2

Tasks are published under the Creative Commons Attribution 4.0 International license