int main() {
    int n;
    st = NULL; 

    cout << "Vavedete broi chisla (1-5000): ";
    if (!(cin >> n) || n < 1) {
        cout << "nevaliden broi!" << endl;
        return 1;
    }

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

    long long sum = 0;
    int value;

    while (pop(value)) {
        sum += value;
    }

    cout << "Sumata na chislata e: " << sum << endl;

    return 0;
}