func main()
	var a: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	if(a > b)
		var tmp: int :: a
		do a :: b
		do b :: tmp
	end if
	do b :: [b, a + 1].min()
	var ans: int :: a + b - 1
	do cui@print("\{ans}\n")
end func