摘要: 题目链接:P6528 「Wdoi-1」完美冻结 题目大意:求 \(\Large{\sum_{l_1\leq i \leq r_1}\sum_{l_2\leq j \leq r_2}\left \lfloor \frac{\sum_{l=\min(i,j)}^{\max(i,j)} a_l}{k} \ 阅读全文
posted @ 2020-12-17 11:10 with_hope 阅读(597) 评论(2) 推荐(1)