import sys
input = sys.stdin.buffer.readline

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

ans = 0
changing = False
for a, b in zip(A, B):
    if a == b:
        if changing:
            changing = False
            ans += 1
    else:
        changing = True

if changing:
    ans += 1

print(ans)