2021.1.11寒假打卡Day8哈尔滨学院2021ACM冬令营Day2（20级）
哈尔滨学院2021ACM冬令营Day2（20级）The puzzleProblem DescriptionKayaking is playing a puzzle game containing n different blocks. He marks the blocks with integers from 1 to n, which show the blocks’ original positions. Each time he can exchange two blocks and h
