bky373

class Solution {
    fun solution(answers: IntArray): IntArray {
        val student1 = intArrayOf(1, 2, 3, 4, 5)
        val student2 = intArrayOf(2, 1, 2, 3, 2, 4, 2, 5)
        val student3 = intArrayOf(3, 3, 1, 1, 2, 2, 4, 4, 5, 5)
        val results = mutableListOf(0, 0, 0)
        var a = 0
        var b = 0
        var c = 0
        

bky373

class Solution {
    fun solution(n: Int): Int {
        var sum = 0
        var number = n
        while(number%10 != 0 || number > 0){
           sum += number%10
           number = number/10
       }
        return sum
    }

bky373

class Solution {
    fun solution(s: String): String {
        return when(s.length % 2){
            0 -> s.subSequence((s.length / 2) - 1, (s.length / 2) + 1).toString()
            else -> s.subSequence((s.length-1) / 2, (s.length-1) / 2 + 1).toString() 
        }
    }
}

bky373

class Solution {
    fun solution(s: String): Int = s.toInt()
}

bky373

class Solution {
    fun solution(a: Int, b: Int): Long {
        if(a == b) return b.toLong()
        val list = listOf(a, b).sorted()
        return (list[0]..list[1]).map { it.toLong() }.sum()
    }
}

bky373

class Solution {
    fun solution(s: String): Boolean {
        val chars = s.toCharArray()
        return chars.all{ it.isDigit() } && (chars.size == 4 || chars.size == 6)
    }
}

bky373

class Solution {
    fun solution(array: IntArray, commands: Array<IntArray>) {
        fun solution(array: IntArray, commands: Array<IntArray>): IntArray {
            var answer: IntArray

            answer = commands.map {
                val i = it[0]-1
                val j = it[1]
                val k = it[2]-1
                val subArr = array.toMutableList().subList(i, j).sortedBy { it }