public interface Vector<T> {

	int size();
	
	boolean isEmpty();
	
	T elemAtRank(int r) throws VectorOutOfBoundsException;
	
	void replaceAtRank(int r, T elem) throws VectorOutOfBoundsException;
	
	void insertAtRank(int r, T elem) throws VectorOutOfBoundsException;
	
	T removeAtRank(int r) throws VectorOutOfBoundsException;
	
}