HackerRank/Algorithm/CountingSort kotlin

CountingSort.kt

fun countingSort(arr: Array<Int>): Array<Int> =
    IntArray(100) { 0 }
        .apply {
            arr.forEach { this[it]++ }
        }
        .toTypedArray()

fun main(args: Array<String>) {
    val n = readln().trim().toInt()

    val arr = readln().trimEnd()
        .split(" ")
        .map(String::toInt)
        .toTypedArray()

    val result = countingSort(arr)
    println(result.joinToString(" "))
}