01.我们在Models中写数据库的操作.具体的查询代码如下: <?php namespace App\Models\System; use CodeIgniter\Model; class User_model extends Model { var $Db; function __construct() { parent::__construct(); //创建数据库连接 $this->Db = \Config\Database::connect(); } function getdata
Navigation Nightmare Time Limit: 2000MS Memory Limit: 30000K Total Submissions: 5939 Accepted: 2102 Case Time Limit: 1000MS Description Farmer John's pastoral neighborhood has N farms (2 <= N <= 40,000), usually numbered/labeled 1..N. A series o
Exclusive-OR Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 152 Accepted Submission(s): 55 Problem Description You are not given n non-negative integers X0, X1, ..., Xn-1 less than 220 , but th