摘要：
链接：https://ac.nowcoder.com/acm/contest/102/C来源：牛客网 题目描述 We define a value of an interval is the second largest number of it's elements, and of course a 阅读全文
摘要：
Let us consider a special type of a binary search tree, called a cartesian tree. Recall that a binary search tree is a rooted ordered binary tree, suc 阅读全文
摘要：
Xuanxuan has n sticks of different length. One day, she puts all her sticks in a line, represented by S1, S2, S3, ...Sn. After measuring the length of 阅读全文