from bisect import bisect_left
N,M,K = map(int,input().split())
B = list(input().split())
op = B.pop(0)
B = sorted(list(map(int,B)))
A = sorted([int(input()) for _ in range(N)])
if op=="+":
    cnt = 0
    for i in range(N):
        a = A[i]
        if a>=K:
            cnt += M
        else:
            ind = bisect_left(B,K-a)
            cnt += M-ind
else:
    cnt = 0
    for i in range(N):
        a = A[i]
        if a>=K:
            cnt += M
        else:
            ind = bisect_left(B,K//a+bool(K%a))
            cnt += M-ind
print(cnt)