#include <bits/stdc++.h>
using namespace std;
const int N = 1e6;
long long ar[N];
long long dp[N];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  ;
  long long n;
  cin >> n;
  for (long long int i = 0; i < n; i++) {
    cin >> ar[i];
  }
  sort(ar, ar + n);
  if (ar[0] == ar[n / 2]) {
    cout << "Bob\n";
  } else
    cout << "Alice\n";
  return 0;
}
