摘要: F Greedy Sequence You're given a permutation aa of length nn (1 \le n \le 10^51≤n≤105). For each i \in [1,n]i∈[1,n], construct a sequence s_isi​ by th 阅读全文
posted @ 2019-09-04 09:02 Young-children 阅读(160) 评论(0) 推荐(0) 编辑