spiral-matrix

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Algorithms

Given an <code>m x n</code> <code>matrix</code>, return all elements of the <code>matrix</code> in spiral order.

&nbsp;
Example 1:
<img alt="" src="https://assets.leetcode.com/uploads/2020/11/13/spiral1.jpg" style="width: 242px; height: 242px;" />
<pre>
Input: matrix = [[1,2,3],[4,5,6],[7,8,9]]
Output: [1,2,3,6,9,8,7,4,5]
</pre>

Example 2:
<img alt="" src="https://assets.leetcode.com/uploads/2020/11/13/spiral.jpg" style="width: 322px; height: 242px;" />
<pre>
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]
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>m == matrix.length</code></li>
	<li><code>n == matrix[i].length</code></li>
	<li><code>1 &lt;= m, n &lt;= 10</code></li>
	<li><code>-100 &lt;= matrix[i][j] &lt;= 100</code></li>
</ul>

spiralOrder

Spiral Matrix

Spiral Matrix II

spiral-matrix-ii

螺旋矩阵 II

Spiral Matrix III

spiral-matrix-iii

螺旋矩阵 III

Spiral Matrix IV

spiral-matrix-iv

螺旋矩阵 IV

Array

Matrix

Simulation

给你一个 <code>m</code> 行 <code>n</code> 列的矩阵 <code>matrix</code> ，请按照 顺时针螺旋顺序 ，返回矩阵中的所有元素。

 

示例 1：
<img alt="" src="https://assets.leetcode.com/uploads/2020/11/13/spiral1.jpg" style="width: 242px; height: 242px;" />
<pre>
输入：matrix = [[1,2,3],[4,5,6],[7,8,9]]
输出：[1,2,3,6,9,8,7,4,5]
</pre>

示例 2：
<img alt="" src="https://assets.leetcode.com/uploads/2020/11/13/spiral.jpg" style="width: 322px; height: 242px;" />
<pre>
输入：matrix = [[1,2,3,4],[5,6,7,8],[9,10,11,12]]
输出：[1,2,3,4,8,12,11,10,9,5,6,7]
</pre>

 

提示：

<ul>
	<li><code>m == matrix.length</code></li>
	<li><code>n == matrix[i].length</code></li>
	<li><code>1 <= m, n <= 10</code></li>
	<li><code>-100 <= matrix[i][j] <= 100</code></li>
</ul>