Table of Contents
链表解法
数学解法
Home Backend Development PHP Tutorial 约瑟夫环有关问题的链表解法和数学解法(PHP)

约瑟夫环有关问题的链表解法和数学解法(PHP)

Jun 13, 2016 pm 12:23 PM
array head return

约瑟夫环问题的链表解法和数学解法(PHP)

约瑟夫环问题

一群猴子排成一圈,按1,2,…,n依次编号。然后从第1只开始数,数到第m只,把它踢出圈,从它后面再开始数,再数到第m只,在把它踢出去…,如此不停的进行下去,直到最后只剩下一只猴子为止,那只猴子就叫做大王。要求编程模拟此过程,输入m、n,输出最后那个大王的编号。

链表解法

<code>function king($n,$m){    $monky = range(1,$n);    $i = 0;    while(count($monky)>1){        $i+=1;        $head = array_shift($monky);        if($i%$m!=0){            array_push($monky,$head);        }    }    return $monky[0];}echo king(10,3);</code>
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数学解法

  • x’ = 2 3 4 5 0
  • x = 0 1 2 3 4
  • x’ = (x+m)%n

    <code>function king2($n,$m){    $r = 0;    for($i=2;$i</code>
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