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