#include <bits/stdc++.h>
using namespace std;
#define ll long long

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int N;
    cin >> N;
    vector<ll> A(N);
    for (int i=0;i<N;i++) cin >> A[i];
    ll ans = 0LL;
    for (int i=0;i<N;i+=2) {
        ans ^= A[i];
    }
    if (ans == 0) {
        cout << "Bob" << "\n";
    } else {
        cout << "Alice" << "\n";
    }
    return 0;
}