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2021年3月29日
AtCoder Regular Contest 116 B - Products of Min-Max（排列组合）
摘要： Problem Statement Given is a sequence A of N integers. There are 2N−1 non-empty subsequences B of A. Find the sum of max(B)×min(B) over all of them. S 阅读全文
posted @ 2021-03-29 23:55 脂环 阅读(111) 评论(0) 推荐(0) 编辑