#include <bits/stdc++.h>
using namespace std;
inline int toInt(string s) {
  int v;
  istringstream sin(s);
  sin >> v;
  return v;
}
template <class T>
inline string toString(T x) {
  ostringstream sout;
  sout << x;
  return sout.str();
}
inline int readInt() {
  int x;
  scanf("%d", &x);
  return x;
}
int a[55];
int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < (int)n; ++i) scanf("%d", &a[i]);
  sort(a, a + n);
  if (a[0] == a[n / 2])
    printf("Bob\n");
  else
    printf("Alice\n");
  return 0;
}
