nt main() {

    int n;
    int sar[50];
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> sar[i];
    }
    for (int i = 0; i < n; i++) {
        if (i % 2 == 0) {
            cout << sar[i] << " ";
        }
        //cout << ((i % 2 == 1) ? sar[i] ) << " ";
    }
    cout << endl;
    return 0;
}