#include <bits/stdc++.h>
using namespace std;
int read() {
  int w = 0, f = 1;
  char c = ' ';
  while (c < '0' || c > '9') c = getchar(), f = c == '-' ? -1 : f;
  while (c >= '0' && c <= '9') w = w * 10 + c - 48, c = getchar();
  return w * f;
}
int n, a[55];
signed main() {
  n = read();
  for (int i = 1; i <= n; i++) a[i] = read();
  sort(a + 1, a + n + 1);
  puts(a[n / 2 + 1] == a[1] ? "Bob" : "Alice");
  return 0;
}
