#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
ifstream in_file("C:\\verseny\\minta\\be1.txt");
#define input in_file
#define INTHENAMEOFGOD
#else
#define input cin
#define INTHENAMEOFGOD \
    ios::sync_with_stdio(0); \
    cin.tie(0); \
    cout.tie(0);
#endif
typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<bool> vb;
typedef pair<ll, ll> pii;

ll N, a, M, akt;
vector<pii> v;

int main() {
    input >> N;
    v.resize(N);
    for (ll n = 0; n < N; n++) {
        input >> a;
        v[n].first = a;
    }
    for (ll n = 0; n < N; n++) {
        input >> a;
        v[n].second = a;
        M += a;
    }
    akt = M;

    sort(v.begin(), v.end(), [](pii &l, pii &r) {
        return l.first > r.first;
    });

    for (pii &p : v) {
        akt -= max(0LL, min(p.second, akt-p.first));
    }

    cout << M + akt << endl;
}