class Integer
	def isqrt
		return 0 if self<=0
		return 1 if self<4 # 1
		x,y=0,self
		while x!=y&&x+1!=y
			x,y=y,(self/y+y)/2
		end
		x
	end
end
H=Hash.new 0
X,Y=gets.split.map &:to_i
R=Y.isqrt
(1..R).each{|x|(0..R).each{|y|H[x*x+y*y]+=1}}
p (X..Y).map{|i|H[i]}.max*4