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