#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int n;
  cin >> n;
  vector<int> v(n);
  for (int i = 0; i < n; i++) {
    cin >> v[i];
  }
  sort(v.begin(), v.end());
  int m = v[0];
  for (int i = n - 1; i >= n / 2; i--) {
    v[i]--;
  }
  sort(v.begin(), v.end());
  if (v[0] == m) {
    cout << "Alice" << endl;
  } else {
    cout << "Bob" << endl;
  }
  return 0;
}
