#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (int)(n); i ++)
#define irep(i,n) for (int i = (int)(n) - 1;i >= 0;--i)
using namespace std;
using ll = long long;
using PL = pair<ll,ll>;
using P = pair<int,int>;
constexpr int INF = 1000000000;
constexpr long long HINF = 100000'00000'00000'000;
constexpr long long MOD = 1000000007;// = 998244353;
constexpr double EPS = 1e-4;
constexpr double PI = 3.14159265358979;


int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int N; cin >> N;
    vector<int> A(N),B(N);
    rep(i,N) cin >> A[i];
    rep(i,N) cin >> B[i];

    int ans = 0;
    int cnt = 0;
    rep(i,N) {
        if (A[i] != B[i]) cnt = 1;
        else {
            ans += cnt;
            cnt = 0;
        }
    }
    ans += cnt;
    cout << ans << '\n';
    return 0;
}