import sys
input = sys.stdin.readline

N = int(input())
A = list(map(int,input().split()))
B = list(map(int,input().split()))
f = [1 if A[i]!=B[i] else 0 for i in range(N)]
f.append(0)
ans = 0

for i in range(N):
    if f[i]==1 and f[i+1]==0:
        ans += 1

print(ans)