.text
        .global main
main:
        stmfd   sp!, {lr}
        sub     sp, sp, #4
        mov     r1, sp
        adr     r0, fmt_scanf
        bl      scanf
        ldr     r1, [sp]
        mov     r3, #0
        sub     r1, r3, r1
        adr     r0, fmt_printf
        bl      printf
        mov     r0, #0
        add     sp, sp, #4
        ldmfd   sp!, {pc}
fmt_scanf:
        .ascii  "%d"
fmt_printf:
        .ascii  "%d\n\000"
        .align  4