func main()
	var a: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	
	var x: int :: a + b
	var ans: int :: 0
	var d: int :: 1
	while(x <> 0)
		if(x % 10 = 1)
			do ans :+ d
		end if
		do d :* 2
		do x :/ 10
	end while
	do cui@print("\{ans}\n")
end func