#include <bits/stdc++.h>
using namespace std;
int gcd(int x, int y){
    if (x==0){
        return y;
    }
    return gcd(y%x, x);
}
signed main() {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int maximum = a[0];
    for (int i = 0; i < n; i++) {
        maximum = max(maximum, a[i]);
    }
    int d = gcd(a[0], a[1]);
    for (int i = 2; i < n; i++) {
        d = gcd(d, a[i]);
    }
    if ((maximum/d)%2==n%2){
        cout << "Bob" << endl;
    } else {
        cout << "Alice" << endl;
    }
}