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.
|
||
|
|
|
||
|
|
**Example 1:**
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
Input: n = 3
|
||
|
|
Output: [[1,2,3],[8,9,4],[7,6,5]]
|
||
|
|
|
||
|
|
|
||
|
|
**Example 2:**
|
||
|
|
|
||
|
|
Input: n = 1
|
||
|
|
Output: [[1]]
|
||
|
|
|
||
|
|
|
||
|
|
**Constraints:**
|
||
|
|
|
||
|
|
* `1 <= n <= 20`
|