#include <bits/stdc++.h>
using namespace std;
const double EPS = 1e-9;
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  long long n;
  cin >> n;
  vector<long long> a(n);
  for (long long i = (0); i < (n); i++) cin >> a[i];
  sort(a.begin(), a.end());
  if (a[0] == a[n / 2])
    cout << "Bob" << endl;
  else
    cout << "Alice" << endl;
  return 0;
}
