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A safari park（野生动物园）has K species of animals, and is divided into N regions. The managers hope to spread the animals to all the regions, but not the s 阅读全文
posted @ 2021-03-09 23:08
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A game of numbers has the following rules: at the beginning, two distinct positive integers are given by the judge. Then each player in turn must give 阅读全文
posted @ 2021-03-09 22:38
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The above picture is from Sina Weibo, showing May 23rd, 2019 as a very cool "Prime Day". That is, not only that the corresponding number of the date 2 阅读全文
posted @ 2021-03-09 21:40
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