Untitled

n, m = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
h, w = map(int, input().split())


def count(n, a, x):
    ret, sum, head, tail = 0, 0, 0, 0
    while head < n:
        while tail < n and sum + a[tail] <= x:
            sum += a[tail]
            tail += 1

        if sum == x:
            ret += 1

        sum -= a[head]
        head += 1

    return ret


print(count(n, a, h) * count(m, b, w))