/* 滑动窗口算法框架 */
void slidingWindow(string s, string t) {
unordered_map<char, int> need, window;
for (char c : t) need[c]++;
int left = 0, right = 0;
int valid = 0;
wh...
假设Index应用的index.php控制器如下<?php
namespace app\index\controller;
use app\index\BaseController;
use think\facade\View;
use think\facade\Db; //数据库
class Index extends BaseController
{
public f...
