#include <bits/stdc++.h>
using namespace std;
const int maxn = (int)5e5 + 100;
const long long inf = (1ll << 60);
const int mod2 = (int)998244353;
const int mod = (int)1e9 + 7;
string s;
int n;
int a[maxn];
void solve() {
  cin >> n;
  for (int i = 0; i < n; i++) cin >> a[i];
  sort(a, a + n);
  if (a[0] == a[n / 2]) {
    cout << "Bob\n";
  } else {
    cout << "Alice\n";
  }
}
int main() {
  int t = 1;
  for (int i = 1; i <= t; i++) {
    solve();
  }
  return 0;
}
