/**
 * Calculates the intersection of the therapist visits that occur less than the given threshold.
 *
 * @param therapistVisits A list of integers representing the number of visits made by patients to the therapist.
 * @param threshold The maximum number of visits to consider.
 * @return A list containing the therapist visits that occur less than the threshold.
 *
 * Example:
 * calculateIntersectionOfSelectionLessThan(listOf(3, 1, 5, 4, 2, 6), 4) returns [3, 1, 2]
 * calculateIntersectionOfSelectionLessThan(listOf(7, 9, 2, 6, 4, 8), 5) returns [2, 4]
 */
fun calculateIntersectionOfSelectionLessThan(therapistVisits: List<Int>, threshold: Int): List<Int> {

    val selectedVisits = therapistVisits.filter { it < threshold }
    val uniqueVisits = selectedVisits.toSet().toList()
    return uniqueVisits.sorted()
}
/**
 * Calculates the intersection of the therapist visits that occur less than the given threshold.
 *
 * @param therapistVisits A list of integers representing the number of visits made by patients to the therapist.
 * @param threshold The maximum number of visits to consider.
 * @return A list containing the therapist visits that occur less than the threshold.
 *
 * Example:
 * calculateIntersectionOfSelectionLessThan(listOf(3, 1, 5, 4, 2, 6), 4) returns [3, 1, 2]
 * calculateIntersectionOfSelectionLessThan(listOf(7, 9, 2, 6, 4, 8), 5) returns [2, 4]
 */
fun calculateIntersectionOfSelectionLessThan(therapistVisits: List<Int>, threshold: Int): List<Int> {
/**
 * Calculates the intersection of the therapist visits that occur less than the given threshold.
 *
 * @param therapistVisits A list of integers representing the number of visits made by patients to the therapist.
 * @param threshold The maximum number of visits to consider.
 * @return A list containing the therapist visits that occur less than the threshold.
 *
 * Example:
 * calculateIntersectionOfSelectionLessThan(listOf(3, 1, 5, 4, 2, 6), 4) returns [3, 1, 2]
 * calculateIntersectionOfSelectionLessThan(listOf(7, 9, 2, 6, 4, 8), 5) returns [2, 4]
 */
fun calculateIntersectionOfSelectionLessThan(therapistVisits: List<Int>, threshold: Int): List<Int> {

    val selectedVisits = therapistVisits.filter { it < threshold }
    val uniqueVisits = selectedVisits.toSet().toList()
    return uniqueVisits.sorted()
}