# 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

A_REMAIN = AS.reject { |a| a >= K }
B_REMAIN = BS.reject { |b| b >= K }

puts(case OP
     when :+
       A_REMAIN.map do |a|
         B_REMAIN.map { |b| a + b }
         .filter { |c| c >= K }.size
       end .sum
     when :*
       A_REMAIN.map do |a|
         B_REMAIN.map { |b| a * b }
         .filter { |c| c >= K }.size
       end .sum
     end + COUNT)