step1:打开题库

step2:选择 AT,此时连接应该是https://www.luogu.com.cn/problem/list?type=AT&page=1

step3:选择黄题（普及/提高-）此时链接 https://www.luogu.com.cn/problem/list?type=AT&difficulty=3&page=1

结果：往下翻出现红题