Baekjoon(Kotlin) - 10811. 바구니 뒤집기

URL : https://www.acmicpc.net/problem/10811

10811번: 바구니 뒤집기

 

[ RESULT ]

import java.io.BufferedReader
import java.io.BufferedWriter
import java.io.InputStreamReader
import java.io.OutputStreamWriter

val br = BufferedReader(InputStreamReader(System.`in`))
val bw = BufferedWriter(OutputStreamWriter(System.out))

fun main() {
    val (N, M) = br.readLine()!!.split(" ").map { it.toInt() }
    var arr: MutableList<Int> = (1..N).toMutableList()

    repeat(M) {
        val (i, j) = br.readLine()!!.split(" ").map { it.toInt() }
        reverseArr(arr, i, j)
    }

    bw.write("${arr.joinToString(" ")}\n")

    br.close()
    bw.flush()
    bw.close()
}

fun reverseArr(arr: MutableList<Int>, i: Int, j: Int) {
    for (k in 0 until (j - i + 1) / 2) {
        val temp = arr[i - 1 + k]
        arr[i - 1 + k] = arr[j - 1 - k]
        arr[j - 1 - k] = temp
    }
}