随笔分类 -  题解

摘要:2020牛客暑期多校训练营(第二场)J - Just Shuffle 阅读全文
posted @ 2020-09-01 22:57 ljxtt 阅读(257) 评论(0) 推荐(2)
摘要:Educational Codeforces Round 93 (Rated for Div. 2) 阅读全文
posted @ 2020-08-15 12:21 ljxtt 阅读(159) 评论(0) 推荐(0)
摘要:$$ \sum_{a_{1}=1}^{n} \sum_{a_{2}=1}^{n} \ldots \sum_{a_{x}=1}^{n}\left(\prod_{j=1}^{x} a_{j}^{k}\right) f\left(\operatorname{gcd}\left(a_{1}, a_{2}, \ldots, a_{x}\right)\right) \cdot \operatorname{gcd}\left(a_{1}, a_{2}, \ldots, a_{x}\right) $$ 阅读全文
posted @ 2020-08-06 20:17 ljxtt 阅读(204) 评论(0) 推荐(0)
摘要:序列变换 HDU - 5256 阅读全文
posted @ 2020-01-21 20:01 ljxtt 阅读(394) 评论(0) 推荐(1)
摘要:Educational Codeforces Round 80 (Rated for Div. 2) 阅读全文
posted @ 2020-01-17 01:39 ljxtt 阅读(313) 评论(0) 推荐(0)
摘要:寒假集训 - 个人训练赛 1 阅读全文
posted @ 2020-01-16 00:48 ljxtt 阅读(293) 评论(0) 推荐(0)
摘要:给你 $n$ 根木根,任选 3 根,能组成三角形的概率是多少? 阅读全文
posted @ 2020-01-14 23:32 ljxtt 阅读(316) 评论(0) 推荐(0)