2020年12月19日
Codeforces Round #691 (Div. 2)
摘要： A. 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 ra 阅读全文
posted @ 2020-12-19 22:55 墨墨墨小白iiy💭💡🎈 阅读(115) 评论(0) 推荐(0) 编辑
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