#include <bits/stdc++.h>
#define REP(i, n) for (int i = 1; i <= n; i++)

using namespace std;

int n, ans;
bool a[1000010], b[1000010], c[1000010];
signed main() {
    cin >> n;
    REP(i, n) {
        cin >> a[i];
    }
    REP(i, n) {
        cin >> b[i];
    }
    REP(i, n) {
        c[i] = a[i] ^ b[i];
    }
    REP(i, n) {
        if (!c[i - 1] && c[i]) {
            ans++;
        }
    }
    cout << ans << endl;
}