.text
main:
	.data
a:	.word	0
bb:	.word	0
x:	.word	0
copy1:	.word	0
y:	.word	0
copy2:	.word	0
z:	.word	0
result:	.word	0
statuscode:	.word	0
	.text
	li $v0,5
	syscall
	move $t0,$v0
	sw $t0,a
	li $t0,0
	sw $t0,bb
	lw $t0,a
	lw $t1,bb
	seq $t0,$t0,$t1
	bnez $t0,GETNUMS
	li $t0,1
	sw $t0,bb
	lw $t0,a
	lw $t1,bb
	seq $t0,$t0,$t1
	bnez $t0,GETNUMS
	b ERROR
GETNUMS:
	li $v0,5
	syscall
	move $t0,$v0
	sw $t0,x
	li $v0,5
	syscall
	move $t0,$v0
	sw $t0,y
	li $t0,1
	sw $t0,bb
	lw $t0,a
	lw $t1,bb
	sne $t0,$t0,$t1
	bnez $t0,SUBNUMS
ADDNUMS:
	lw $t0,x
	sw $t0,copy1
	lw $t0,y
	sw $t0,copy2
	lw $t0,x
	lw $t1,y
	add $t0,$t0,$t1
	sw $t0,result
	b PRINT
SUBNUMS:
	lw $t0,y
	sw $t0,copy1
	lw $t0,x
	sw $t0,copy2
	lw $t0,x
	lw $t1,y
	sub $t0,$t0,$t1
	sw $t0,result
	b PRINT
PRINT:
	lw $t0,a
	li $t1,0
	seq $t0,$t0,$t1
	bnez $t0,WRITESUBOPS
	lw $t0,copy1
	li $v0,1
	move $a0,$t0
	syscall
	lw $t0,copy2
	li $v0,1
	move $a0,$t0
	syscall
	b WRITERESULT
WRITESUBOPS:
	lw $t0,copy2
	li $v0,1
	move $a0,$t0
	syscall
	lw $t0,copy1
	li $v0,1
	move $a0,$t0
	syscall
	b WRITERESULT
WRITERESULT:
	lw $t0,result
	sw $t0,z
	lw $t0,z
	li $v0,1
	move $a0,$t0
	syscall
	li $t0,0
	sw $t0,statuscode
	b FINISHED
ERROR:
	li $t0,1
	neg $t0,$t0
	sw $t0,statuscode
	b FINISHED
FINISHED:
	lw $t0,statuscode
	li $v0,1
	move $a0,$t0
	syscall
	li $v0,10
	syscall