U336010 UKE

题目背景

https://www.luogu.com.cn/training/375302

题目描述

https://www.luogu.com.cn/training/375302

输入格式

https://www.luogu.com.cn/training/375302

输出格式

https://www.luogu.com.cn/training/375302

说明/提示

https://www.luogu.com.cn/training/375302