#include <bits/stdc++.h>
using namespace std;
int ar[55];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> ar[i];
  }
  sort(ar, ar + n);
  bool flag = 0;
  if (ar[n / 2] == ar[0]) flag = 1;
  if (flag)
    cout << "Bob";
  else
    cout << "Alice";
  cout << '\n';
  return 0;
}
