Monty hall problem is kotlin

MontyHall.kt

import kotlin.system.measureTimeMillis

const val GOAT = "goat"
const val CAR = "car"
const val OUT = "out"
val RANGE = (0..2)

/**
 * put a car behind one door
 */
fun populateDoors(): List<String> {
    val car = RANGE.random()
    return RANGE.map {
        if (it == car) CAR else GOAT
    }
}

fun playGame(firstChoice: Int): List<String> {
    return populateDoors().mapIndexed { index, door ->
        if ((door != CAR) and (index != firstChoice)) {
            OUT
        } else {
            door
        }
    }
}

fun count(): () -> Int {
    var counter = 0
    return { counter++ }
}

/**
 * playing the game 100,000 times
 */
fun main() {
    val wins = count()
    val losses = count()
    val elapsed = measureTimeMillis {
        (0 until 100000).forEach { _ ->
            val firstChoice = RANGE.random() // choose a random door
            val result = playGame(firstChoice)

            if (result[firstChoice] == CAR) {
                losses() // contestant switched to losing door
            } else {
                wins() // contestant switched to winning door
            }
        }
    }
    println(
        """
        All choices were switched.
        Wins: ${wins()}
        Losses: ${losses()}
        Elapsed time: $elapsed ms
    """.trimIndent()
    )
}