[백준] Tournament Selection (14038)(kotlin)

원본 문제

문제 설명

Each player in a tournament plays six games. There are no ties. The tournament director places the players in groups based on the results of games as follows:

• if a player wins 5 or 6 games, they are placed in Group 1;
• if a player wins 3 or 4 games, they are placed in Group 2;
• if a player wins 1 or 2 games, they are placed in Group 3;
• if a player does not win any games, they are eliminated from the tournament.

Write a program to determine which group a player is placed in

입력

The input consists of six lines, each with one of two possible letters: W (to indicate a win) or L (to indicate a loss).

출력

The output will be either 1, 2, 3 (to indicate which Group the player should be placed in) or -1 (to indicate the player has been eliminated).

테스트 케이스

입력	출력
W L W W L W	2
L L L L L L	-1

문제 풀이1

import java.util.Scanner

fun main(args: Array<String>) = println(
    (0 until 6)
        .map { sc.next() }
        .count { it == "W" }
        .let {
            when (it) {
                in 5..6 -> 1
                in 3..4 -> 2
                in 1..2 -> 3
                else -> -1
            }
        }
)

val sc = Scanner(System.`in`)