#include <iostream>

using namespace std;

int main(int argc, char* argv[]) {

    int n;
    while(cin >> n) {
        int nums[n];
        for(int i = 0;i < n;++i) {
            cin >> nums[i];
        }
        if(nums[n - 1] == 1) {
            cout << "Alice" << endl;
        } else {
            cout << "Bob" << endl;
        }
    }
    return 0;
}