# 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).reject { |b| b >= K }.sort

AS = N.times.map { gets.to_i }.reject { |a| a >= K }.sort

COUNT = N * M - AS.size * BS.size

puts(case OP
     when :+
       AS.map do |a|
         count = 0
         BS.each_with_index do |b, i|
           if a + b >= K
             count += AS.size - i + 1
             break
           end
         end
         count
       end.sum
     else
       AS.map do |a|
         count = 0
         BS.each_with_index do |b, i|
           if a * b >= K
             count += AS.size - i + 1
             break
           end
         end
         count
       end.sum
     end + COUNT)