#include <iostream>
#include <map>
#include <set>
#include <vector>
using namespace std;

int main()
{
    int n;
    cin >> n;

    vector<int> daski(n);
    for(int i = 0; i < n; i++) {
        cin >> daski[i];
    }

    sort(daski.begin(), daski.end());

    vector<pair<int, int>> v(n);

    for(int i = 0; i < n; i++) {
        cin >> v[i].first >> v[i].second;
    }

    sort(v.begin(), v.end(), [](const auto &a, const auto &b) {
        return a.second > b.second;
    });

    long long res = 0;
    for(int i = 0; i < n; i++) {
        int visina = v[i].first;

        int idx = (int) (upper_bound(daski.begin(), daski.end(), visina) - daski.begin());


        idx--;
        if(idx >= 0 and idx < (int) daski.size()) {
            if(daski[idx] <= v[i].first) {
                res += v[i].second;
                daski.erase(daski.begin() + idx);
            }



        }

    }
    cout << res << endl;
    return 0;
}