#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;

int main() {

    int N;
    cin >> N;


    vector<int> as;
    for (int i = 0; i < N; ++i) {
        int A;
        cin >> A;
        as.push_back(A);
    }
    vector<int> bs;
    for (int i = 0; i < N; ++i) {
        int B;
        cin >> B;
        bs.push_back(B);
    }

    vector<bool> cs;
    for (int i = 0; i < N; ++i) {
        cs.push_back(as[i] == bs[i]);
    }
    // sentinel
    cs.push_back(true);

    int cnt = 0;
    for (int i = 0; i < N; ++i) {
        if (cs[i]) {
            continue;
        } else {
            if (cs[i + 1]) {
                cnt += 1;
            } else {
                continue;
            }
        }
    }
    cout << cnt << endl;


}