package java.lang;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
@Target(RetentionPolicy.METHOD)
@Retention(RetentionPolicy.SOURCE)
public @interface Implements
{
   /**
   * The set of interface that the speficied method implements
   */
   Class[] value();
}

import java.util.*;
public class SequenceList extends AbstractList<Integer>
{
   int start;
   int size;
   public SequenceList(int start,int end)
   {
      this.start = start;
      this.end = start-end;
   }
   @Implements(List.class)
   public Integer get(int index)
   {
      if(index < 0 || index >= size)
         throw new IndexOutOfBoundsException();
      return start+index;
   }
   
   @Implements(Iterable.class,Collection.class)
   public Iterator<Integer> iterator()
   {
      return new Iterator<Integer>()
      {
         int count = 0;
         @Implements(Iterator.class)
         public boolean hasNext()
         {
            return count < size;
         }
         public Integer next()
         {
            if(!hasNext())
               throw new NoSuchElementException();
            return start+count++;
         }
         public void remove()
         {
            throw new UnsupportedOperationException();
         }
      };
   }
 
   @Implements(Collection.class)
   public int size()
   {
      return size;
   }
}