写着玩约瑟夫环

最新推荐文章于 2024-11-14 15:54:34 发布

原创最新推荐文章于 2024-11-14 15:54:34 发布 · 173 阅读

CC 4.0 BY-SA版权

<?php
/**
 * Created by PhpStorm.
 * User: pyf
 * Date: 2016/11/21
 * Time: 11:32
 */
namespace app\member\controller;

class Test
{

    //穷举版  性能比较差
    public function test(){
        $limit = 4;
        $start = 1;
        $array = [1,2,3,4,5,6,7,8,9,10];
        while(true){
            $left_num = count($array);

            if($left_num == 0){
                break;
            }else{
                $last = $array;
                $dead_index = ($start+$limit)%$left_num;
                if($dead_index == 0){
                    $dead_index = 1;
                    array_splice($array,$left_num-1,1);
                }else{
                    array_splice($array,$dead_index-1,1);
                }
                $start = $dead_index;
            }
        }
        dump($last);die;

    }

}