#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
    int n;
    cin >> n;
    vector <int> a(n);
    for (int i = 0; i < n; ++i)
        cin >> a[i];
    sort(a.begin(), a.end());
    long long sum = 0;
    for (auto x : a)
    {
        if (x <= sum + 1)
            sum += x;
        else
            break;
    }
    cout << sum + 1 << endl;
}