#include <bits/stdc++.h>
using namespace std;
inline int read() {
  int x = 0, f = 0;
  char ch = getchar();
  while (!isdigit(ch)) f |= ch == '-', ch = getchar();
  while (isdigit(ch)) x = x * 10 + (ch ^ 48), ch = getchar();
  return f ? -x : x;
}
int a[500010];
signed main() {
  int n = read();
  for (int i = 1; i <= n; i++) a[i] = read();
  sort(a + 1, a + n + 1);
  puts(a[1] == a[n / 2 + 1] ? "Bob" : "Alice");
  return 0;
}
