class Integer
  def mod_inverse(mod)
    self.pow(mod - 2, mod)
  end
end

N, M, K = gets.split.map(&:to_i)
op, *B = gets.chomp.split
B.map!(&:to_i)
A = N.times.map { gets.to_i }
ans = 0
mod_counter = Hash.new(0)
mod_counter_plus = Hash.new(0)

B.each do |b|
  mod_counter[b % (K - 1)] += 1
  mod_counter_plus[b % K] += 1
end

A.each do |a|
  if op == '+'
    mk = a % K
    ans += mod_counter_plus[K - mk]
  else
    if a % K == 0
      ans += M
    else
      ans += mod_counter[1] + mod_counter[K - 1 - a.mod_inverse(K - 1)]
    end
  end
end

puts ans