/* -*- coding: utf-8 -*-
 *
 * 1506.cc:  No.1506 Unbalanced Pocky Game - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);

  bool win = false;
  for (int i = 0; i < n; i++) {
    int ai;
    scanf("%d", &ai);

    if (ai == 1) win ^= true;
    else win = true;
  }

  if (win) puts("Alice");
  else puts("Bob");
  return 0;
}