import sys
import math
sys.setrecursionlimit(10 ** 7)
def input() : return sys.stdin.readline().strip()
def INT()   : return int(input())
def MAP()   : return map(int,input().split())
def LIST()  : return list(MAP())
def NIJIGEN(H): return [list(input()) for i in range(H)]
N=int(input())
L=list(map(int,input().split()))
R=list(map(int,input().split()))
ans=0
p=1
for i in range(N):
    if L[i]==R[i] and p==0:
        ans+=1
        p=1
    elif L[i]!=R[i] and p==1:
        p=0
if L[-1]==R[-1]:
    ans-=1
print(ans+1)