#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 5;
int a[maxn];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i <= n; ++i) {
    scanf("%d", &a[i]);
  }
  sort(a + 1, a + 1 + n);
  if (a[1] == a[n / 2 + 1])
    cout << endl << "Bob" << endl;
  else
    cout << endl << "Alice" << endl;
  return 0;
}
