N = int(input())
A = list(map(int,input().split()))
B = list(map(int,input().split()))

ans = 0
flg = 0
for i in range(N):
  if A[i] != B[i]:
    flg = 1
  if A[i] == B[i]:
    ans += flg
    flg = 0
if A[-1] != B[-1]:
  ans += 1
print(ans)