import sys
readline = sys.stdin.readline
from bisect import *

N, M, K = map(int,readline().split())
B = list(input().split())
op = B[0]
B.pop(0)
B = list(map(int, B))
B.sort()
ans = 0
for i in range(N):
    A = int(readline())
    if op == "+":
        ans += M - bisect_left(B, K - A)
    else:
        ans += M - bisect_left(B, (A + K - 1)//A)
print(ans)