2017年12月6日
摘要：
You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, say x... 阅读全文
摘要：
Hands that shed innocent blood!There are n guilty people in a line, thei-th of them holds a claw with length Li. The bell rings and ev... 阅读全文
摘要：
There are many homeless cats in PKU campus. They are all happy because the students in the cat club of PKU take good care of them. Li ... 阅读全文
摘要：
The Yongzheng Emperor (13 December 1678 – 8 October 1735), was the fifth emperor of the Qing dynasty of China. He was a very hard-work... 阅读全文