import sys

N,M,K=map(int,input().split())
B=list(input().split())
A=[int(input()) for i in range(N)]

ANS=0
from collections import Counter

if B[0]=="+":
    B=list(map(int,B[1:]))
    A=Counter([a%K for a in A])
    B=Counter([b%K for b in B])

    for c in A:
        ANS+=A[c]*B[K-c]

    print(ANS)
    sys.exit()
        
B=list(map(int,B[1:]))

import math
x=K
xr=math.ceil(math.sqrt(x))

LIST=[]
for i in range(1,xr+1):
    if x%i==0:
        LIST.append(i)
        LIST.append(x//i)

L=sorted(set(LIST),reverse=True)

SC=[0]*len(L)
for i in range(len(L)):
    l=L[i]
    for b in B:
        if b%l==0:
            SC[i]+=1

for a in A:
    for i in range(len(L)):
        l=L[i]
        if a%l==0:
            ANS+=SC[len(L)-i-1]
            break

print(ANS)