Crossover einer doppelt verketten Liste (std::list) in c++.

crossover.cpp

std::ostream& operator<<(std::ostream& ostr, const std::list<std::string>& list) {
    for (auto &i : list) {
        ostr << " " << i;
    }
    return ostr;
}

////////

    int position = 4;
    std::list<std::string> list1 = {"A", "B", "C", "D", "E", "F"};
    std::list<std::string> list2 = {"U", "V", "W", "X", "Y", "Z"};

    auto it1 = list1.begin();
    std::advance(it1, position);
    auto it2 = list2.begin();
    std::advance(it2, position);

    list1.splice(it1, list2, it2, list2.end());
    list2.splice(list2.end(), list1, it1, list1.end());

    std::cout << "list1: " << list1 << "\n";
    std::cout << "list2: " << list2 << "\n";