#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<cmath>

using namespace std;

typedef long long ll;

int N;
bool a[1000000 + 100], b[1000000 + 100];

int main() {
	cin >> N;
	for (int i = 0; i < N; i++)cin >> a[i];
	for (int i = 0; i < N; i++)cin >> b[i];

	int ans = 0;
	for (int i = 0; i < N; i++) {
		if (a[i] != b[i]) {
			if (i == 0)ans++;
			else {
				if (a[i - 1] == b[i - 1])
					ans++;
			}
		}
	}
	cout << ans << endl;

	return 0;
}