摘要：Guanguan's Happy water 4000ms 262144K Rather than drinking happy water, Guanguan loves storing happy water. So he bought a refrigerator and stored a_i 阅读全文

摘要：The Queen’s Super-circular Patio 题目描述 The queen wishes to build a patio paved with of a circular center stone surrounded by circular rings of circular 阅读全文

摘要：Greedy Sequence 限制 5000 ms 256 MB You're given a permutation a of length n (1 ≤ n ≤ 105). For each i ∈ [1, n], construct a sequence si by the followin 阅读全文

摘要：J: Just Repeat 题目描述 When Cuber QQ was chatting happily in a QQ group one day, he accidentally noticed that there was a counterfeit of him, who stole h 阅读全文