sm05-3

    .text
    .global main
main:
    push {lr}
    mov r0, #0
    mov r1, #0
solve:
    ldr r3, =stdin
    ldr r3, [r3]
    add r1, #4
    push {r0, r1}
    mov r0, r3
    bl fgetc
    mov r3, r0
    pop {r0, r1}
    push {r1, r3}
    bl realloc
    pop {r1, r3}
    sub r1, #4
    str r3, [r0, r1]
    add r1, #4
    cmp r3, #-1
    beq continue
    b solve
continue:
    sub r1, #4
    ldr r2, [r0, r1]
    add r1, #4
    push {r0, r1}
    mov r0, r2
    ldr r3, =stdout
    ldr r3, [r3]
    mov r1, r3
    cmp r0, #-1
    blne fputc
    pop {r0, r1}
    subs r1, #4
    bne continue
end_of_solve:
    bl free
    mov r0, #0
    pop {lr}
    bx lr