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2020年5月12日
Codeforces Round #639 (Div. 2) C. Hilbert's Hotel（数学）
摘要： Hilbert's Hotel is a very unusual hotel since the number of rooms is infinite! In fact, there is exactly one room for every integer, including zero an 阅读全文
posted @ 2020-05-12 00:11 脂环 阅读(239) 评论(0) 推荐(1) 编辑