#include <bits/stdc++.h>
using namespace std;
int arr[60];
signed main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  for (int i = 0; i < n; ++i) cin >> arr[i];
  sort(arr, arr + n);
  bool aliceWins = (arr[0] < arr[n >> 1]);
  cout << (aliceWins ? "Alice\n" : "Bob\n");
}
