/*

    +--------------+
    | Song         |
    +--------------+
    | String title | 
    | int    time  |
    +--------------+  

 */  

//to represent a song
class Song implements ISame{

  String title;
  int    time;

  Song(String title, int time){
    this.title=title;
    this.time=time;
  }

  //is this song the same as that object   
  public boolean same(ISame that){ 
    if (that instanceof Song)
      return this.title.equals(((Song)that).title)
      && this.time==((Song)that).time;
    else 
      return false; 
  } 
}