#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i, a[100002];
  cin >> n;
  for (i = 0; i < n; i++) {
    cin >> a[i];
  }
  sort(a, a + n);
  if (a[n / 2] != a[0])
    cout << "Alice";
  else
    cout << "Bob";
  return 0;
}
