# frozen_string_literal: true

N, M, K = gets.chomp.split.map(&:to_i)

ROW = gets.chomp.split
OP = ROW[0].intern
BS = ROW[1..-1].map(&:to_i)

AS = N.times.map do
  gets.to_i
end

count_a = AS.filter { |a| a >= K }.size
count_b = BS.filter { |b| b >= K }.size
COUNT = count_a * M + count_b * N - count_a * count_b

CS = AS.reject { |a| a >= K }.map do |a|
  BS.reject { |b| b >= K }.map do |b|
    case OP
    when :+
      a + b
    when :*
      a * b
    end
  end
end

puts(CS.flatten.filter { |c| c >= K }.size + COUNT)