program main
    implicit none
    integer(8)::N,flg,i,ans=0
    integer(8),allocatable::A(:),B(:)
    read*,N
    allocate(A(N))
    allocate(B(N))
    read*,A,B

    flg=0
    do i=1,N
        if(A(i)/=B(i))then
            if(flg==0)then
                flg=1
                ans=ans+1
            end if
        else
            flg=0
        end if
    end do

    print'(i0)',ans
end program main