public class IntCompSeq: IntSequence{

  private IntSequence s1, s2;  // Binary sequence: Exactly two subsequences.

  public IntCompSeq(IntSequence s1, IntSequence s2) {
    this.s1 = s1;
    this.s2 = s2;
  }

  public IntSequence First{
    get{return s1;}
  }

  public IntSequence Second{
    get{return s2;}
  }

  public override int Accept(Visitor v){
    return v.Visit(this);
  } 
}