Help Mocha To Sort - KOTLIN

import java.util.*

var sc: Scanner = Scanner(System.`in`)

fun main() {
    val n: Int = sc.nextInt()
    val s: String = sc.next()
    helpMochaToSort(n, s)
}

fun helpMochaToSort(n: Int, s: String) {
    val res: java.util.ArrayList<Int> = java.util.ArrayList<Int>()
    val temp: CharArray = s.toCharArray()
    Arrays.sort(temp)
    for (i in 0 until n) {
        if (s[i] != temp[i])
            res.add(i)
    }
    if (res.isEmpty()) {
        println(0)
        return
    }
    println(1)
    print(res.size.toString() + " ")
    for (a in res)
        print("$a ")
    println()
}