#include <bits/stdc++.h>
using namespace std;
int n, a[100050], cnt = 0;
int main() {
  cin >> n;
  for (int i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  for (int i = 0; i < n; i++)
    if (a[i] > cnt) cnt++;
  cout << cnt + 1;
  return 0;
}
