program main
  implicit none
  integer::N,K,i,j,l
  type bar
     integer::x,y
  end type bar
  integer::indx(100),pos(100),ans(100),anspos(100),temp
  type(bar)::bars(6000)
  data l/0/

  read *,N,K
  if(K.gt.0) read *,bars(1:K)
  read *,anspos(1:N)
  indx = (/(i,i=1,N)/)

  do i=1,N
     ans(anspos(i)) = i
  end do

  do i=1,K
     temp = indx(bars(i)%y)
     indx(bars(i)%y) = indx(bars(i)%x)
     indx(bars(i)%x) = temp
  end do

  do i=1,N
     pos(indx(i)) = i
  end do
!  print *, ans(1:N)
!  print *, indx(1:N)

  do i=1,N
     if(indx(i).eq.ans(i)) cycle
     do j=pos(ans(i))-1,i,-1
        l = l + 1
        bars(l)%x = j
        bars(l)%y = j+1
        pos(indx(j)) = pos(indx(j)) + 1
        indx(j+1) = indx(j)
     end do
     indx(i) = ans(i)
!     print *, indx(1:N)
  end do

  print '(i0)', l
  do i=1,l
     print '(i0," ",i0)',bars(i)%x,bars(i)%y
  end do
end program main