.text
.globl main

main:
    li $a0, 4
    li $a1, 2
    li $a2, 1
    li $a3, 0

    li $v0, 5
    syscall
    move $s0, $v0

    lw $a3, 0
    addi $a2, $a2, 1
    addi $a1, $a1, 2
    add  $a0, $a0, $a1
    addi $a0, 1
    sub  $a3, $s0, $a0