import collections
import math

N, M, K = [int(x) for x in input().split()]
C = [x for x in input().split()]
B = [int(x) for x in C[1:]]
A = [int(input()) for _ in range(N)]

B_K = []
A_K = []
c_B_K = None
c_A_K = None
if C[0] == '+':
    B_K = [x % K for x in B]
    c_B_K = collections.Counter(B_K)
else:
    B_K = [math.gcd(x, K) for x in B]
    A_K = [math.gcd(x, K) for x in A]
    c_B_K = collections.Counter(B_K)
    c_A_K = collections.Counter(A_K)

ans = 0

if C[0] == '+':
    for j in range(N):
        ans += c_B_K[K - A[j] % K]
else:
    for b in c_B_K.keys():
        for a in c_A_K.keys():
            if (a * b) % K == 0:
                ans += c_B_K[b] * c_A_K[a]
print(ans)