U484412 Better Luogu!

题目背景

[![Page Views Count](https://badges.toozhao.com/badges/01J95CZG6335KR6650XRNXRVKH/orange.svg)](https://badges.toozhao.com/stats/01J95CZG6335KR6650XRNXRVKH "Get your own page views count badge on badges.toozhao.com")

题目描述

无

输入格式

无

输出格式

无