x, y = gets.strip.split.map(&:to_i)
ans = Array.new(10_000_000, 0)
sqrt = Integer.sqrt y
for i in 1..sqrt
    a = i * i
    for j in 0..sqrt
        b = j * j
        break if a + b > y
        ans[a + b] += 1
    end
end

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