// The IntList interface defines a set of operations for an ordered collection
// (sequence) of integers.

public interface IntList extends Iterable<Integer> {
    public int size();
    public int get(int index);
    public int indexOf(int value);
    public boolean isEmpty();
    public boolean contains(int value);
    public void add(int value);
    public void add(int index, int value);
    public void addAll(IntList other);
    public void remove(int index);
    public void removeAll(IntList other);
    public void set(int index, int value);
    public void clear();
}