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.
1976
2001
1994
1974
2005
2017
1985
2009
2022
2002
2018
1939
2006
1999
1990
2024
2019
2008
