#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  vector<int> a(n);
  for (int i = 0; i < n; i++) scanf("%d", &a[i]);
  sort(a.begin(), a.end());
  puts(a[n / 2] != a[0] ? "Alice" : "Bob");
}
