n, m, k = gets.chomp.split.map(&:to_i)

b = gets.chomp.split
op = b.shift
a = [] * n
h = Hash.new(0)
b.each do |bi|
  h[bi.to_i % k] += 1
end
b.sort!
n.times do
  a << gets.chomp.to_i % k
end

ans = 0
hh = {}

if op == '+'
  a.each do |ai|
    ans += h[k - ai]
  end
else
  ans += h[0] * n
  a.each do |ai|
    g = ai.gcd(k)

    next if g == 1

    v = k / g
    if hh[v]
      ans += hh[v]
      next
    end

    sum = 0
    v.step(k, v) do |j|
      sum += h[j]
    end

    hh[v] = sum
    ans += hh[v]
  end
end

puts ans