#include <bits/stdc++.h>
using namespace std;
int N, A[1000001], B[1000001], C[1000001], ans;
int main() {
    // 入力
    cin >> N;
    assert(1 <= N && N <= 1000000);
    for (int i = 1; i <= N; i++) {
        cin >> A[i];
        assert(A[i] == 0 || A[i] == 1);
    }
    for (int i = 1; i <= N; i++) {
        cin >> B[i];
        assert(B[i] == 0 || B[i] == 1);
    }

    // a_iとb_iが違う場合C_iを1にする
    for (int i = 1; i <= N; i++) {
        C[i] = A[i] ^ B[i];
    }
    for (int i = 1; i <= N; i++) {
        if (C[i - 1] == 0 && C[i] == 1) {
            ans++;
        }
    }
    cout << ans << endl;
    return 0;
}