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题目链接 题目 Certainly, everyone is familiar with tic-tac-toe game. The rules are very simple indeed. Two players take turns marking the cells in a 3 × 3 g 阅读全文
posted @ 2021-12-23 18:49
zhangtingxi
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题目链接 题目 古埃及,人们使用单位分数的和(形如 \(\dfrac{1}{a}\) 的,\(a\) 是自然数)表示一切有理数。如:\(\dfrac{2}{3} = \dfrac{1}{2} + \dfrac{1}{6}\),但不允许 \(\dfrac{2}{3} = \dfrac{1}{3} + 阅读全文
posted @ 2021-12-23 18:24
zhangtingxi
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