import sys

input = sys.stdin.buffer.readline

N = int(input())
A = tuple(map(int, input().split()))
B = tuple(map(int, input().split()))
B_acc = [0] * (N + 1)
for i in range(N):
    B_acc[i + 1] = (B_acc[i] + B[i]) % 2
B_acc_acc = [0] * (N + 2)
for i in range(N):
    B_acc_acc[i + 1] = B_acc_acc[i] + B_acc[i]

s = 0
l = 0
ans = 0
for r, a in enumerate(A):
    while s & a:
        s -= A[l]
        l += 1
    s |= a
    if B_acc[r + 1]:
        ans += B_acc_acc[r + 1] - B_acc_acc[l]
    else:
        ans += r + 1 - l - (B_acc_acc[r + 1] - B_acc_acc[l])
print(ans)