#include <bits/stdc++.h>
const double esp = 1e-6;
const double pi = acos(-1.0);
const int INF = 0x3f3f3f3f;
const int inf = 1e9;
using namespace std;
int read() {
  char ch = getchar();
  int x = 0, f = 1;
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    x = x * 10 + ch - '0';
    ch = getchar();
  }
  return x * f;
}
int n;
int a[100];
int main() {
  n = read();
  for (int i = 0; i < n; i++) {
    a[i] = read();
  }
  sort(a, a + n);
  if (a[0] == a[n / 2]) {
    cout << "Bob" << endl;
  } else
    cout << "Alice" << endl;
  return 0;
}
