import sys
input = sys.stdin.readline

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

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