import kotlin.collections.* const val a1 = setOf(1, 2, 3).size const val a2 = setOf(1, 2, 3, 3, 2, 1).size const val b = emptySet().size const val c = setOf().hashCode() @CompileTimeCalculation fun getSum(set: Set): Int { var sum: Int = 0 for (element in set) { sum += element } return sum } const val sum = getSum(setOf(1, 3, 5, 7, 7, 5))