import sys
input = sys.stdin.buffer.readline

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

ans = 0
changing = False
for i in range(N):
    if A[i] == B[i]:
        if changing:
            changing = False
            ans += 1
    else:
        changing = True

if changing:
    ans += 1

print(ans)