func main()
	var a1: int :: cui@inputInt()
	var a2: int :: cui@inputInt()
	var a3: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	var ans: int :: [a3 * 3, a1 + a2 + a3 + b].max()
	do cui@print("\{ans}\n")
end func