$*$ isEqual $-$ return $1$ if x $==$ y$,$ and $0$ otherwise

$*($tip: which bitwise op computes the difference?$)$

$*$ Examples: isEqual$(5,5)=1,$ isEqual$(4,5)=0$

$*$ Legal ops: $!$ ~ & $^|+<<>>$

$*$ Max ops: $2$

$*$ Rating: $2$