x, y = gets.strip.split.map(&:to_i)
ans = Array.new(10_000_000, 0)
sqrt = Integer.sqrt y
1.step(sqrt) do |i|
    a = i * i
    sqrt.times do |j|
        b = j * j
        if a + b < 10_000_000
            ans[a + b] += 1 
        end
    end
end

puts ans[x..y].max * 4