[백준] A-B (1001)(Kotlin)

[백준] A-B

원본 문제

문재 풀이1

import java.io.BufferedReader
import java.io.InputStreamReader

fun main() = with(BufferedReader(InputStreamReader(System.`in`))) {

    val (a: Int, b: Int) = readLine()
        .split(" ")
        .map { it.toInt() }

    println(a - b)

}

문제 풀이2

import java.io.BufferedReader
import java.io.InputStreamReader

fun main() = with(BufferedReader(InputStreamReader(System.`in`))) {

    println(
        readLine()
            .split(" ")
            .map { it.toInt() }
            .reduce{ a, b -> a - b }
    )

}