#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int n, a[N];
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) scanf("%d", &a[i]);
  std::sort(a + 1, a + 1 + n);
  if (a[n / 2 + 1] == a[1])
    puts("Bob");
  else
    puts("Alice");
  return 0;
}
