class Song extends Object120 {
    String title;
    String artist;
    double length;  // running time, in s.
    boolean isCopyrighted;
    
    
    // the "constructor":
    Song( String t, String a, double l, boolean isC ) {
        super(t,a,l,isC);  // <-- `super` is voodoo, for now
    }
    
    
    /** return whether `s` can be stored using `space` disk-space.
     * @param s the song to consider
     * @param space the amount of available space it has to fit into, in B.
     */
    static boolean willFit( Song s, int space ) {
        return (s.length/60)*3.0*Math.pow(2,20) <= space;
    }
    
    /** return whether one song is shorter than another.
     * @return whether s1 is shorter than s2.
     */
    static boolean isShorter( Song s1, Song s2 ) {
        return (s1.length < s2.length);
    }
    
    static void testAll() {
        // some examples of Song objects:
        Song s1 = new Song("Old Town Road", "Little Nas X", 120, true);
        Song s2 = new Song("Ring Ring", "Abba", 180, true);
        Song s2a = new Song("Ring Ring", "Abba", 180, true);
    }
    
}