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A、Maximum Element In A Stack As an ACM-ICPC newbie, Aishah is learning data structures in computer science. She has already known that a stack, as a d 阅读全文
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