You can upsolve tasks from 2005–2021 in the BOI Contest Collection.
| year | statements | testdata | solutions |
|---|---|---|---|
| 2022 | day 1 day 2 | download | download |
| 2021 | day 1 day 2 | download | download |
| 2020 | day 1 day 2 | download | download |
| 2019 | day 1 day 2 | download | download |
| 2018 | day 1 day 2 | download | download |
| 2017 | day 1 day 2 | download | download |
| 2016 | day 1 day 2 | download | download |
| 2015 | day 1 day 2 | download | download |
| 2014 | day 1 day 2 | download | download |
| 2013 | day 1 day 2 | download | download |
| 2012 | day 1 day 2 | download | download |
| 2011 | day 1 day 2 | download | download |
| 2010 | day 1 day 2 | download | download |
| 2009 | day 1 day 2 | download | download |
| 2008 | day 1 day 2 | download | download |
| 2007 | day 1 day 2 | download | download |
| 2006 | day 1 day 2 | download | download |
| 2005 | day 1 day 2 | download | download |
| 2004 | day 1 day 2 | download | download |
| 2003 | day 1 day 2 | download | download |
| 2002 | day 1 day 2 | download | download |
| 2001 | day 1 day 2 | download | download |
| 2000 | day 1 day 2 | download | download |
| 1999 | day 1 day 2 | download | download |
| 1998 | day 1 day 2 | download | |
| 1997 | day 1 day 2 | download | download |
| 1996 | day 1 day 2 | download | download |
| 1995 | day 1 day 2 | download | download |