1824D
CF1824D
[原题](https://codeforces.com/contest/1824/problem/C) [翻译](https://www.luogu.com.cn/problem/CF1824C) 我们定义$f(l,r,x)=\sum_{j=1}^{x}{\sum_{i=l}^{\min{(j,r) ......
[CF1824D] LuoTianyi and the Function
## 题目描述 LuoTianyi gives you an array $ a $ of $ n $ integers and the index begins from $ 1 $ . Define $ g(i,j) $ as follows: - $ g(i,j) $ is the large ......