!> This file was processed by `fypp`.
!> Today's fortune: "Bad WA", really OK?
!> ランダムウォーク猿「'乱択' で はっぴー.」
!> ギャンブラー猿「流れが来てる...!」
program f902836
  use, intrinsic :: iso_fortran_env
  !> auto use module
  implicit none
  integer(int32) :: n
  integer(int64), allocatable :: arr(:)
  integer(int32) :: i
  read(input_unit, *) n
  allocate(arr(n))
  read(input_unit, *) arr(:)
  write(output_unit, '(a)') trim(merge("Yes", "No ", any(arr(:) == 0) .or. any(arr(:) == 1)))
end program f902836