#include <bits/stdc++.h>
using namespace std;
int a[1001];
int main() {
  int n, cnt = 0;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  sort(a, a + n);
  if (a[0] == a[n / 2])
    cout << "Bob" << endl;
  else
    cout << "Alice" << endl;
  return 0;
}
