- 刘锦辰 的博客
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- @ 2024-9-15 15:03:00
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洛谷跳转矩阵(点击下面的字):
主题库
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$ 1^2+2^2+3^2+....+(n-1)^2+n^2=(n \times (n+1) \times (2n+1)) \div 6 $
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求所有正整数和质数,使得


