题解 | 约瑟夫环

import java.util.Scanner

fun main(args:Array<String>){
    val read = Scanner(System.`in`)
    val inputLine = read.nextLine()
    val tokens = inputLine.split(" ")
    val a = tokens[0].toInt()
    val b = tokens[1].toInt()
    val c = tokens[2].toInt()
    //创建人员编号列表
    val people  = (0..a-1).toMutableList()
    var tarIndex = (b+c-1)%a //索引从1-based转化成0-based
    while (people.size>1){
        //移除索引位置的人
        people.removeAt(tarIndex)
        //计算下一个要移除的位置
        tarIndex = (tarIndex+c-1) % people.size
    }
    var result =  people[0]
    println(result)
}