/**
 * Specifies the operations a PriorityQueue must implement
 * If we are defining a PQ using Comparable objects.
 * So I am calling this PriorityQueue1
 */
public interface PriorityQueue1<T extends Comparable<T>> {
	/**
	 * Returns the number of items in the queue.
	 */
	public int size();
	
	/**
	 * Adds a new item to the priority queue.
	 * @param item the item to add
	 */
	public void add(T item);
	
	/**
	 * Removes the item with highest priority from the queue.
	 * @return
	 */
	public T remove();
}