#include <bits/stdc++.h>
using namespace std;
int a[100], n;
int main() {
  cin >> n;
  for (int i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  if (a[0] == a[n / 2])
    cout << endl << "Bob";
  else
    cout << endl << "Alice";
  return 0;
}
