发布于
2022-8-14
摘要：
A. Wonderful Permutation You are given a permutation p1,p2,…,pnp1,p2,…,pn of length nn and a positive integer k≤nk≤n. In one operation you can choose 阅读全文
海上月是天上月，眼前人是心上人。
Hi, Toretto!
You got to put the past behind you before you can move on.
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