#include <bits/stdc++.h>
using namespace std;
const long long MAXN = 50 + 10;
long long n, a[MAXN];
int32_t main() {
  cin >> n;
  for (long long i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  if (a[0] == a[n / 2]) return cout << "Bob" << endl, 0;
  return cout << "Alice" << endl, 0;
}
