n = int(input())
na, nb = 0, 0
ans = 0
for x, y, r in zip(list(map(int, input().split())), list(map(int, input().split())), range(n)):
  if r == 0 and x ^ y:
    ans += 1
  elif (x != y) and (na == nb):
    ans += 1
  na, nb = x, y
print(ans)