JunJaBoy

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()

JunJaBoy

import kotlin.*
import kotlin.math.absoluteValue

fun diagonalDifference(arr: Array<Array<Int>>): Int {
    var sum = 0
    for (i in arr.indices) {
        sum += arr[i][i]
        sum -= arr[i][arr.lastIndex - i]
    }
    return sum.absoluteValue

JunJaBoy

import kotlin.*

fun lonelyinteger(a: Array<Int>): Int =
    a.groupingBy { it }
        .eachCount()
        .filterValues { it == 1 }
        .entries
        .single()
        .key

JunJaBoy

import java.time.format.DateTimeFormatter

fun timeConversion(s: String): String {
    val format = DateTimeFormatter.ofPattern("hh:mm:ssa")
    val time = format.parse(s)
    return DateTimeFormatter.ofPattern("HH:mm:ss").format(time)
}

fun main(args: Array<String>) {
    val s = readln()

JunJaBoy

fun miniMaxSum(arr: Array<Int>) {
    val sorted = arr.map(Int::toLong).sorted()
    println("${sorted.dropLast(1).sum()} ${sorted.drop(1).sum()}")
}

fun main(args: Array<String>) {
    val arr = readln().trimEnd()
        .split(" ")
        .map { it.toInt() }
        .toTypedArray()

JunJaBoy

fun main() {
    val target = readln().toInt()

    findSubset(
        initialValue = 1,
        targetValue = target,
        /*
            방문 여부 확인 그래프.
            target + 1개의 인덱스를 가진 리스트 생성, 초기값 지정(초기값 상관 없음)
            인덱스 번호는 탐색한 숫자들을 나타내기 때문에 인덱스 0은 사용하지 않는다.

JunJaBoy

/**
 * copied from jetcaster, android compose samples
 * https://github.com/android/compose-samples/blob/main/Jetcaster/app/src/main/java/com/example/jetcaster/ui/JetcasterAppState.kt
 */
@Suppress("DEPRECATION")
fun checkIfOnline(): Boolean {
    val cm = ContextCompat.getSystemService(context, ConnectivityManager::class.java)

    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        val capabilities = cm?.getNetworkCapabilities(cm.activeNetwork) ?: return false

JunJaBoy

JunJaBoy

@DormDeprecated
fun Modifier.dormShadow(
    color: Color,
    alpha: Float = 0.2f,
    borderRadius: Dp = 0.dp,
    shadowRadius: Dp = 10.dp,
    offsetY: Dp = 0.dp,
    offsetX: Dp = 0.dp,
) = this.drawBehind {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

JunJaBoy

@DormDeprecated
fun Modifier.dormShadow(
    color: Color,
    alpha: Float = 0.2f,
    borderRadius: Dp = 0.dp,
    shadowRadius: Dp = 10.dp,
    offsetY: Dp = 0.dp,
    offsetX: Dp = 0.dp,
) = this.drawBehind {
      val transparentColor =