#include <bits/stdc++.h>
using namespace std;
int arr[200005];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) scanf("%d", &arr[i]);
  sort(arr + 1, arr + 1 + n);
  if (arr[1] == arr[n / 2 + 1])
    printf("Bob\n");
  else
    printf("Alice\n");
  return 0;
}
