N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = [A[i] ^ B[i] for i in range(N)]
ans = 0
for i in range(1, N):
    if C[i - 1] == 1 and C[i] == 0:
        ans += 1
if C[-1] == 1:
    ans += 1
print(ans)