백준 1759번 암호 만들기 with Kotlin

https://www.acmicpc.net/problem/1759

1759번: 암호 만들기

import java.io.BufferedReader
import java.io.BufferedWriter
import java.io.InputStreamReader
import java.io.OutputStreamWriter
import java.lang.StringBuilder
 
val br = BufferedReader(InputStreamReader(System.`in`))
val bw = BufferedWriter(OutputStreamWriter(System.out))
val input = readLine()!!.split(" ").map{it.toInt()}
val n = input[0]
val c = input[1]
var key = mutableListOf<String>()
var str = mutableListOf<String>()
val ans = mutableListOf<String>()
fun main()=with(br){
    val line = readLine()!!.split(" ")
    key = line.sortedBy { it }.toMutableList()
    //println(key)
    makeRandom(0,0)
    //println(ans)
    for(i in 0 until ans.size){
        var moum = 0
        var jaum = 0
        for(j in ans[i]){
            if(j=='a' || j=='e' || j=='i' || j=='o' || j=='u'){
                moum++
            }
            else{
                jaum++
            }
        }
        if(moum>=1 && jaum>=2){
            bw.write("${ans[i]}\n")
        }
    }
    bw.flush()
    bw.close()
}
 
fun makeRandom(index:Int,cnt:Int){
    if(cnt==n){
        var sb = StringBuilder()
        for(i in 0 until str.size){
            sb.append(str[i])
        }
        ans.add(sb.toString())
        return
    }
    for(i in index until c){
        str.add(key[i])
        makeRandom(i+1,cnt+1)
        str.removeLast()
    }
}