import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

n = I()
a = LI()
b = LI()

cnt = 0
ans = 0
for i in range(n):
    if a[i] != b[i]:
        cnt += 1
    else:
        if cnt > 0:
            ans += 1
            cnt = 0
        else:
            continue
if cnt > 0:
    ans += 1

print(ans)