#include <bits/stdc++.h>
using namespace std;
inline long long read() {
  long long x = 0, w = 0;
  char ch = getchar();
  while (!isdigit(ch)) w |= ch == '-', ch = getchar();
  while (isdigit(ch)) x = (x << 1) + (x << 3) + ch - '0', ch = getchar();
  return w ? -x : x;
}
long long w[200007];
signed main() {
  long long n = read();
  for (long long i = 1; i <= n; ++i) w[i] = read();
  sort(w + 1, w + 1 + n);
  if (w[1] != w[n / 2 + 1])
    puts("Alice");
  else
    puts("Bob");
  return 0;
}
