import numpy as np

n, m, k = map(int, input().split())

x1 = list(input().split())

op = x1.pop(0)
b_arr = np.array(list(map(int, x1)))
a_arr = np.array([int(input()) for i in range(n)])
a_arr = a_arr.reshape((n,1))

# print(a_arr)
# print(b_arr)

if op == '+':
    print((b_arr + a_arr >= k).sum())
else:
    print((b_arr * a_arr >= k).sum())