#include <bits/stdc++.h>
using namespace std;
long long n;
int a[100000];
int main() {
  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  sort(a + 1, a + 1 + n);
  if (a[1] == a[n / 2 + 1]) {
    cout << "Bob";
  } else
    cout << "Alice";
  return 0;
}
