func main()
	var _: [][]char :: cui@input().split(" ")
	var x: float :: _[0].toFloat(&)
	var y: float :: _[1].toFloat(&)
	var ans: int :: (lib@dist(x, y, 0.0, 0.0) * 2.0 + 1.0) $ int
	do cui@print("\{ans}\n")
end func