#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  cin >> N;
  int arr[N + 1];
  for (int i = 0; i < N; i++) {
    cin >> arr[i];
  }
  sort(arr, arr + N);
  if (arr[0] != arr[N / 2])
    cout << "Alice" << endl;
  else
    cout << "Bob" << endl;
  return 0;
}
