# 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).sort

AS = N.times.map { gets.to_i }

puts(case OP
     when :+
       AS.map do |a|
         M - (BS.bsearch_index do |b|
           b >= K - a
         end || M)
       end.sum
     else
       AS.map do |a|
         M - (BS.bsearch_index do |b|
           a * b >= K
         end || M)
       end.sum
     end)