int main() {
    int n;
    cout << "Vavedete broi chisla (N): ";
    cin >> n;

    if (n < 1 || n > 5000) {
        cout << "N трябва да е между 1 и 5000." << endl;
        return 1;
    }

    cout << "Vavedete " << n << " chisla" << endl;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        push_r(x);
    }

    long long total_sum = 0;
    int sum;

    while (pop_l(sum)) {
        total_sum += sum;
    }

    cout << "Sumata e: " << total_sum << endl;

    return 0;
}