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