accrazypt的博客

环+逆元 ——牛客多校赛第二场J题 Given a permutation with size n and an integerk, you should find a permutation substitutionP that{1,2,⋯,n} will become {A}A after performing substitution P for exactly k times. Print the permutation after performing P for once on{1,2,⋯,n}