public class LinkedList<T>
{
  private Node<T> start;
  public LinkedList(){
      
  }
  
  public void einfuegen(T zahl){
      Node neu = new Node();
         neu.wert = zahl;
         if (this.start == null) {
      this.start = neu;
             Node current = this.start;
     
      
      while (current.next != null) {
          current = current.next;
      }
      current.next = neu;
    }
  }
  
  public int laenge(){
      int count = 0;
      
      Node current = this.start;
      while(current != null) {
          current = current.next;
          count++;
      }
      return count;
  }
  public String toString(){
      String result = " ";
      Node current = this.start;
      while( current != null) {
          result += current.wert + ",";
          current = current.next;
      }
      return result;
  }
  
  public T erste(){
      if ( this.start == null){
          return null;
      }
      
      T tmp = this.start.wert;
      
      this.start = this.start.next;
      return tmp;
  }
  
  public T getNteZahl(int n){
      Node<T> current = this.start;
      
      for (int i = 0; i < n; i++){
          if (current == null) return null;
          current = current.next;
      }
      if( current == null) return null;
      return current.wert;
  }
  
}