import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
A=[int(i) for i in input().split()]
B=[int(i) for i in input().split()]
ans=0
st=0
for i in range(n):
	if A[i]==B[i] and st==1:
		ans+=1
		st=0
	elif A[i]!=B[i] and st==0:
		st=1
if st==1:
	ans+=1
print(ans)