编程学习 ·
2020/12/19 23:05:44
文章目录A. Red-Blue ShuffleB. Move and TurnC. Row GCDA. Red-Blue Shuffle
题目 There are n cards numbered 1,…,n. The card i has a red digit ri and a blue digit bi written on it.
We arrange all n cards in random order from left to right, with all permutat…