#include <bits/stdc++.h>
using namespace std;
long long int fun(long long int n) {
  if (n % 4 == 0) return n;
  if (n % 4 == 1) return 1;
  if (n % 4 == 2) return n + 1;
  if (n % 4 == 3) return 0;
}
int32_t main() {
  long long int n;
  cin >> n;
  long long int a[n];
  for (long long int i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  long long int f = 0;
  if (a[0] == a[n / 2]) f = 1;
  if (f == 1)
    cout << "Bob";
  else
    cout << "Alice";
  return 0;
}
