#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n;
  cin >> n;
  vector<int> v;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    v.push_back(x);
  }
  sort(v.begin(), v.end());
  if (v[0] == v[n / 2]) {
    cout << "Bob" << endl;
  } else {
    cout << "Alice" << endl;
  }
}
