hack数据：样例2

WA的：

https://www.luogu.com.cn/blog/enceladus/solution-p2777

https://www.luogu.com.cn/blog/QuantumED/solution-p2777

https://www.luogu.com.cn/blog/_post/13872

https://www.luogu.com.cn/blog/user12070/solution-p2777

CE的：

https://www.luogu.com.cn/blog/PinkRabbit/solution-p2777

https://www.luogu.com.cn/blog/enjoyit/solution-p2777

https://www.luogu.com.cn/blog/foollycoolly/solution-p2777

请求将以上题解全部撤下。