#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=1;i<N;i+=2) { ans ^= A[i]; } if (ans == 0) { cout << "Bob" << "\n"; } else { cout << "Alice" << "\n"; } return 0; }