class CombinedClassifier {
private:
    FastClassifier * FastCl;
    MainClassifier * MainCl;
    string strFast;
    string strMain;
public:
    CombinedClassifier(const string& s1, const string& s2) : strFast(s1), strMain(s2) {
    }

    double classify(const string& s) {
        try {
            std::unique_ptr<FastClassifier> FastCl(new FastClassifier(strFast));
            double res1 = FastCl->classify(s);
            return res1;
        } catch (TooHardObjectException) {
            std::unique_ptr<MainClassifier> MainCl(new MainClassifier(strMain));
            double res2 = MainCl->classify(s);
            return res2;
        }
    }
};