program main
  implicit none
  integer*8::N,K,i,j,count,tmp
  integer*8,allocatable::D(:)
  data count/0/
  read *,N,K
  allocate(D(N))
  read *,D

  do i=1, N-1
     if(D(i).ne.i) then
        tmp = D(i)
        D(i) = D(tmp)
        D(tmp) = tmp
        count = count + 1
     end if
  end do

  if(count .gt. K ) then
     print '("NO")'
  else if(MOD(count,2).eq.MOD(K,2)) then
     print '("YES")'
  else
     print '("NO")'
  end if
!  call aprinter(D)
contains
  subroutine aprinter(array)
    integer*8::array(:)
    character*32::cformat='(i0,     (1x,i0))'
    write(cformat(5:9),'(i0)'),size(array)
    write(*,cformat) array
  end subroutine aprinter
end program main