#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int s[105];
  for (int i = 0; i < n; i++) cin >> s[i];
  sort(s, s + n);
  if (s[n / 2] == s[0])
    cout << "Bob";
  else
    cout << "Alice";
  return 0;
}
