#include <bits/stdc++.h>
using namespace std;
const int maxn = 10006;
int num[maxn];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) scanf("%d", &num[i]);
  sort(num + 1, num + 1 + n);
  if (num[n / 2 + 1] != num[1]) {
    printf("Alice\n");
  } else
    printf("Bob\n");
  return 0;
}
