// The SongList class that represents a circular linked list of Song nodes
// Your name here

public class SongList 
{
    // instance variables
    private Song m_last;
    private int m_numElements; 

    // constructor
    // Do not make any changes to this method!
    public SongList()
    {
        m_last = null;
        m_numElements = 0;
    }

    // check whether the list is empty
    // Do not make any changes to this method!
    boolean isEmpty()
    {
        if (m_last == null)
            return true;
        else
            return false;
    }

    // return the size of the list (# of Song nodes)
    // Do not make any changes to this method!
    public int size()
    {
        return m_numElements;
    }

    // add a new Song to the circular linked list with the given artist and 
    // title, keeping the list sorted by *song title*.
    public void add(String artist, String title)
    {
        // TODO: implement this method
    }

    // remove a Song associated with the given artist and title from the list,
    // keeping the list sorted by *song title*.
    public boolean remove(String artist, String title)
    {
        // TODO: implement this method
    }
    
    
    // build and return a circular linked list that contains all songs from the
    // given artist
    public SongList buildList(String artist)
    {
        // TODO: implement this method
    }
    
    // return a string representation of the list
    // Do not make any changes to this method!
    public String toString()
    {           
        String listContent = "";
        Song current = m_last;
        
        if (m_last != null)
            do
            {
                current = current.getLink();
                listContent += "  [" + current.getArtist() + " - " + current.getTitle() + "]\n";

            } while (current != m_last);

        return listContent;
    }    
}