int poc = 0;
    typename map<Key, map<Key, map<Key, Value > > >::const_iterator it1;
    typename map<Key, map<Key, Value > >::const_iterator it2;
    typename map<Key, Value >::const_iterator it3;
    for (it1 = this->begin(); it1 != this->end(); it1++) {
        for (it2 = it1->second.begin(); it2 != it1->second.end(); it2++) {
            if (it2->first == kluc2) {
                for (it3 = it2->second.begin(); it3 != it2->second.end(); it3++) {
                    if (it3->first == kluc3) {
                        poc++;
                    }
                }
            }
        }
    }
    return poc;