.data
A:  .long   0
    .global A

    .text
    .global dec
dec:
    movl    A,  %ebx
    movl    A,  %eax
    call    writei32
    call    nl
    subl    $1,     %ebx
    movl    %ebx,   A
    cmpl    $0, %ebx
    jge     dec
    ret

    .global main
main:
    call    readi32
    movl    %eax,   A
    cmp     $0, A
    jge     dec
    call finish