#include <bits/stdc++.h>
long long mod = (long long)1e9;
using namespace std;
int main() {
  int n;
  long long x;
  long long sum = 0;
  scanf("%d", &n);
  long long mi = 100;
  long long ans = 0;
  int a[55];
  for (int i = 0; i < n; i++) {
    scanf("%lld", &a[i]);
  }
  sort(a, a + n);
  if (a[0] != a[n / 2]) {
    cout << "Alice" << endl;
  } else {
    cout << "Bob" << endl;
  }
}
