摘要：
I. Yukino With Subinterval 题目链接： Problem Descripe Yukino has an array $a_1, a_2 \cdots a_n$. As a tsundere girl, Yukino is fond of studying subinterva 阅读全文
摘要：
I. query 题目链接： Problem Description Given a permutation $p$ of length $n$, you are asked to answer $m$ queries, each query can be represented as a pair 阅读全文