MySet.kt

/**
 * A Set is a data structure that contains multiple (zero or more) elements.
 *    - The elements in the Set are unique. (no duplication)
 *    - The elements in the Set are not kept in given order. (unordered)
 */
class MySet {
    /**
     * This property shows the number of elements that are currently available in the Set.
     */
    var size: Int = 0

    /**
     * Checks if the Set is empty.
     *
     * @return true if the Set is empty, false otherwise
     */
    fun isEmpty(): Boolean = false

    /**
     * Checks if the given integer is available in the Set.
     *
     * @return true if the given element is available in the Set, false otherwise
     */
    fun contains(i: Int): Boolean = false

    /**
     * Adds a new element to the Set. 
     * 
     * @return true if the element was not already in the Set, false otherwise 
     */
    fun add(i: Int): Boolean = false

    /**
     * Removes the given element from the Set.
     * 
     * @return true if the elements was in the Set, false otherwise
     */
    fun remove(i: Int): Boolean = false
}