#include <bits/stdc++.h>
using namespace std;
const long long N = 2e5 + 5;
const long long MOD = 1e9 + 7;
long long n, a[55];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  cin >> n;
  for (long long i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  if (a[0] == a[n / 2])
    cout << "Bob";
  else
    cout << "Alice";
}
