transpose-matrix

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Algorithms

Given a 2D integer array <code>matrix</code>, return the transpose of <code>matrix</code>.

The transpose of a matrix is the matrix flipped over its main diagonal, switching the matrix&#39;s row and column indices.

<img alt="" src="https://assets.leetcode.com/uploads/2021/02/10/hint_transpose.png" style="width: 600px; height: 197px;" />

&nbsp;
Example 1:

<pre>
Input: matrix = [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]
</pre>

Example 2:

<pre>
Input: matrix = [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]
</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;= 1000</code></li>
	<li><code>1 &lt;= m * n &lt;= 105</code></li>
	<li><code>-109 &lt;= matrix[i][j] &lt;= 109</code></li>
</ul>

transpose

Transpose Matrix

Array

Matrix

Simulation

给你一个二维整数数组 <code>matrix</code>， 返回 <code>matrix</code> 的 转置矩阵 。

矩阵的 转置 是指将矩阵的主对角线翻转，交换矩阵的行索引与列索引。

<img alt="" src="https://assets.leetcode.com/uploads/2021/02/10/hint_transpose.png" style="width: 600px; height: 197px;" />

 

示例 1：

<pre>
输入：matrix = [[1,2,3],[4,5,6],[7,8,9]]
输出：[[1,4,7],[2,5,8],[3,6,9]]
</pre>

示例 2：

<pre>
输入：matrix = [[1,2,3],[4,5,6]]
输出：[[1,4],[2,5],[3,6]]
</pre>

 

提示：

<ul>
	<li><code>m == matrix.length</code></li>
	<li><code>n == matrix[i].length</code></li>
	<li><code>1 <= m, n <= 1000</code></li>
	<li><code>1 <= m * n <= 105</code></li>
	<li><code>-109 <= matrix[i][j] <= 109</code></li>
</ul>