19 lines
350 B
Markdown
19 lines
350 B
Markdown
Given a positive integer `n`, generate an `n x n` `matrix` filled with elements from `1` to `n2` in spiral order.
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**Example 1:**
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Input: n = 3
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Output: [[1,2,3],[8,9,4],[7,6,5]]
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**Example 2:**
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Input: n = 1
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Output: [[1]]
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**Constraints:**
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* `1 <= n <= 20` |