import bisect
import math
n, m, k = map(int, input().split())
bw = list(map(str, input().split()))
a = [int(input()) for i in range(n)]
a.sort()
op = bw.pop(0)
b = [int(i) for i in bw]
b.sort()
ans = 0
if op == "+":
	c = bisect.bisect_left(b,k)
	ans += len(b[c:])*len(a)
	for i in b[:c]:
		d = bisect.bisect_left(a,k-i)
		ans += len(a[d:])
else:
	for i in range(n):
		ans += m - bisect.bisect_left(b,math.ceil(k/a[i]))
print (ans)