#include <bits/stdc++.h>
using namespace std;
int A[51];
int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    A[x]++;
  }
  int y = 0;
  for (int i = 1; i < 51; i++)
    if (A[i]) {
      y = A[i];
      break;
    }
  n /= 2;
  if (y <= n)
    cout << "Alice\n";
  else
    cout << "Bob\n";
  return 0;
}
