func main()
	var x: int :: cui@inputInt()
	var y: int :: cui@inputInt()
	var max: int :: y
	var a: []int :: #[max + 1]int
	var square: []int :: #[(y $ float ^ 0.51) $ int + 1]int
	var map: dict<int, bool> :: #dict<int, bool>
	for i(0, ^square - 1)
		do square[i] :: i ^ 2
		do map.add(square[i], true)
	end for
	for i(0, ^square - 1)
		for j(1, ^square - 1)
			var sum: int :: square[i] + square[j]
			if(sum <= max)
				do a[sum] :+ 1
			end if
		end for
	end for
	
	var ans: int :: a.sub(x, y - x + 1).max() * 4
	do cui@print("\{ans}\n")
end func