// Class ArrayIntList can be used to store a list of integers.

public class ArrayIntList {
    private int[] elementData;
    private int size;

    // constructs a list with a capacity of 100
    public ArrayIntList() {
        elementData = new int[100];
        size = 0;
    }

    // returns a comma-separated, bracketed version of the list
    public String toString() {
        if (size == 0) {
            return "[]";
        } else {
            String result = "[" + elementData[0];
            for (int i = 1; i < size; i++) {
                result += ", " + elementData[i];
            }
            result += "]";
            return result;
        }
    }

    // returns the index of the first occurence of value, -1 if not found
    public int indexOf(int value) {
        for (int i = 0; i < size; i++) {
            if (elementData[i] == value) {
                return i;
            }
        }
        return -1;
    }

    // appends the given value to the end of the list
    public void add(int value) {
        elementData[size] = value;
        size++;
    }

    // adds the value at the given index
    public void add(int index, int value) {
        for (int i = size; i > index; i--) {
            elementData[i] = elementData[i - 1];
        }
        elementData[index] = value;
        size++;
    }

    // removes the value at the given index
    public void remove(int index) {
        for (int i = index; i < size - 1; i++) {
            elementData[i] = elementData[i + 1];
        }
        size--;
    }
}