N = gets.to_i
A = gets.split.map(&:to_i)
B = gets.split.map(&:to_i)
ans = 0
counter = Hash.new(0)

A.permutation(N) do |nums|
  val = 0

  nums.zip(B).each do |a, b|
    next if b >= a

    val += a - b
  end

  counter[val] += 1
  ans = val if ans < val
end

puts counter[ans]