摘要: D. Lucky Permutation You are given a permutation$^\dagger$ $p$ of length $n$. In one operation, you can choose two indices $1 \le i < j \le n$ and swa 阅读全文
posted @ 2023-02-09 19:13 onlyblues 阅读(33) 评论(0) 推荐(0) 编辑
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