The doors of the jam produced by a company do not open. In order for them to be able to sell their jam, they reward the one who can open the jam. All the people try to open the door of the jam.
1948
2022
2011
1993
2015
2023
1985
2007
2005
1997
2017
2019
2009
2013
1988
2021
1982
2025
