$/ = " ";
$y = 2;
while($x = <DATA>){
	chop $x;
	print $num = ($x - $x % $y) / $y xor
	print " " xor
	print $num = int $x / $y xor
	print "\n"
}
__DATA__
-3 -2 -1 0 1 2 3 
##</code><code>##

Output:
-2 -1
-1 -1
-1 0
0 0
0 0
1 1
1 1