#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int inf = INT_MAX;
const int ninf = INT_MIN;
const int mod = 1e9 + 7;
const int N = 1e5 + 2;
int main() {
  int n;
  scanf("%d", &n);
  int a[n];
  for (int i = 0; i < (int)n; i++) scanf("%d", &a[i]);
  sort(a, a + n);
  puts(a[0] == a[n / 2] ? "Bob" : "Alice");
  return 0;
}
