#include <bits/stdc++.h>
using std::sort;
int a[60];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) scanf("%d", &a[i]);
  sort(a, a + n);
  int tmp = a[0];
  for (int i = 1; i <= n / 2; ++i)
    if (a[i] != tmp) {
      puts("Alice");
      return 0;
    }
  puts("Bob");
}
