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59 #12

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happysmile12321 opened this issue Feb 25, 2024 · 0 comments

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happysmile12321 commented Feb 25, 2024 •

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这道题有两个地方不好想，一个是offset,一个是n/2。
1.为什么就一定是n/2，想不明白？
2.为什么是<n-offset?
其实可以用数学思想:"由特殊到一般"来想，举个简单的例子就可以明白了。
假如n就等于4，这样一套，这些索引就可以确定了。

还有，为什么i代表行，j代表列，找一个二维数组遍历一下就知道了。

还有，这道题有个隐藏的，就是对奇数的处理。

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