Past Years Archive

Browse verified problems and solutions from previous olympiads

2025
Problem sets
2024
Problem sets
2023
Problem sets
2022
Problem sets
2021
Problem sets
2020
Problem sets
2019
Problem sets
2018
2 rounds
2017
2 rounds
2016
1 round
2015
1 round
2014
2 rounds
2013
2 rounds
2012
2 rounds
2011
2 rounds
2010
2 rounds
2009
2 rounds
2008
2 rounds
2007
Problem sets
2006
2 rounds
2005
Problem sets
2004
Problem sets
2003
1 round
2002
1 round
2001
1 round
2000
Problem sets
1999
Problem sets
1997
Problem sets
1995
Problem sets