------Input------ 11 1989-11-26 1962-12-02 1963-03-27 1990-03-31 1900-02-28 2000-02-29 2008-08-08 1995-02-28 2012-02-29 2020-02-28 1982-03-01------Answer----- 6574 6575 6575 6575 6574 -1 6574 6575 -1 6575 6575 ------Your output----- 6574