/**
 * An IntList is a list of ints.
 */
public class IntList {

    private int[] elements;

    /**
     * Return an IntList containing the given elements.
     * @param elements the ints to go in the list
     */
    public static IntList make(int... args){
        return new IntList(args);
    }

    private IntList(int[] elements){
        this.elements = elements;
    }

    /**
     * Return an empty list.
     */
    public static IntList getEmpty(){
        return make();
    }

    /**
     * Cons the given element h onto us and return the
     * resulting IntList.
     * @param h the head int for the new list
     * @return the IntList with head h and us for a tail
     */
    public IntList cons (int h) {
        int[] newArray = new int[elements.length + 1];
        for(int i = 0; i < elements.length; i++){
            newArray[i+1] = elements[i];
        }
        newArray[0] = h;
        return new IntList(newArray);
    }

    /**
     * Get our length.
     * @return our int length
     */
    public int length() {
        return elements.length;
    }

    /**
     * Print ourself to System.out.
     */
    public void print() {
        System.out.print("[");
        for(int i = 0; i < elements.length; i++){
            if(i != 0){
                System.out.print(",");
            }
            System.out.print(elements[i]);
        }
        System.out.println("]");
    }
}