#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
bool a[1000010], b[1000010];
int main() {
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	for (int j = 0; j < n; j++) {
		cin >> b[j];
	}
	int ans = 0;
	bool bo = false;
	for (int i = 0; i < n; i++) {
		if (a[i] != b[i]) {
			bo = true;
		}
		else {
			if (bo) {
				ans++;
			}
			bo = false;
		}
	}
	if (bo) {
		ans++;
	}
	cout << ans << endl;
	return 0;
}