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g0001_0100.s0054_spiral_matrix.readme.md Maven / Gradle / Ivy

54\. Spiral Matrix

Medium

Given an `m x n` `matrix`, return _all elements of the_ `matrix` _in spiral order_.

**Example 1:**

![](https://assets.leetcode.com/uploads/2020/11/13/spiral1.jpg)

**Input:** matrix = \[\[1,2,3\],\[4,5,6\],\[7,8,9\]\]

**Output:** \[1,2,3,6,9,8,7,4,5\] 

**Example 2:**

![](https://assets.leetcode.com/uploads/2020/11/13/spiral.jpg)

**Input:** matrix = \[\[1,2,3,4\],\[5,6,7,8\],\[9,10,11,12\]\]

**Output:** \[1,2,3,4,8,12,11,10,9,5,6,7\] 

**Constraints:**

*   `m == matrix.length`
*   `n == matrix[i].length`
*   `1 <= m, n <= 10`
*   `-100 <= matrix[i][j] <= 100`