#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  cin >> n;
  long long arr[n];
  for (int i = 0; i < n; i++) cin >> arr[i];
  sort(arr, arr + n);
  if (arr[0] == arr[n / 2])
    cout << "Bob";
  else
    cout << "Alice";
}
