Write to text file from list without using direct loop using std::list and std::algorithm c++

I have a program that reads a list of assignments and removes the "bad" assignments, then writes into a new file. My function that removes the bad assignments works correctly as well as the function that reads the text file. How can I utilize the std::list and std::algorithm library to write to an output file without using any direct loops? Below is the code I have implemented so far for the removing of the bad assignmemnts (Prune) along with reading the text file. Also below is what I am attempting to get working for the write function commented out

void Prune()
{
    m_Assignments.remove_if([](const Assignment& assignment){ return !assignment.IsGood();});

}

void Read(std::istream& is)
{
    std::string s;

    std::getline(is, s);

    //m_Name = s;


    std::istream_iterator<Assignment> start(is);
    std::istream_iterator<Assignment> stop;
    std::copy(start,stop,std::back_inserter(m_Assignments));



}

void Write(std::ostream& os)
{

    //std::list<Assignment>::iterator i = m_Assignments.begin();
    //std::list<Assignment>::iterator j = m_Assignments.end();
    //std::ostream_iterator<Assignment> (m_Assignments);
    //std::ostream_iterator<Assignment> 
    //(std::copy(i,j,std::back_inserter(m_Assignments)));;
    //std::ostream_iterator<Assignment> stop;
    //std::copy(start,start,std::back_inserter(m_Assignments));

};

Thank you in advance.