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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))