N = int(input())
lA = list(map(int, input().split()))
lB = list(map(int, input().split()))
ans = 0
f = 0
for i in range(N):
    if lA[i] == lB[i] and f == 1:
        ans +=1
        f = 0
    elif lA[i] != lB[i]:
        f = 1

if f == 1:
    print(ans + 1)
else:
    print(ans)