n, m, k = gets.split.map(&:to_i)
op, *b = gets.chomp.split
b.map!(&:to_i)
a = []
n.times{ a << gets.to_i }

sum = 0
n.times do |i|
  m.times do |j|
    sum += [a[i], b[j]].inject(:"#{op}")
    sum %= k
  end
end
puts sum