#include<iostream>
using namespace std;
#include<algorithm>
int main() {
    int n = 0;
    int N[1000001];
    int k = 1;
    cin >> n;
    for (int i = 0;i < n;i++) {
        cin >> N[i];
    }
    sort(N,N+n);
    for (int i = 0;i < n;i++) {
        if (N[i] > k) {
           k++;
        }
        else{
            continue;
        }
    } cout << k;
    return 0;
}