#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void omae_wa_mou_shindeiru(int tc) {
  int n;
  cin >> n;
  vector<long long> v(n);
  for (int i = 0; i < n; i++) cin >> v[i];
  sort(v.begin(), v.end());
  if (v[0] == v[n / 2])
    cout << "Bob"
         << "\n";
  else
    cout << "Alice"
         << "\n";
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int tc = 1;
  for (int i = 1; i < tc + 1; i++) {
    omae_wa_mou_shindeiru(i);
  }
}
