spiral-matrix-ii

java

python

python3

mysql

mssql

oraclesql

csharp

javascript

typescript

bash

swift

kotlin

dart

golang

ruby

scala

rust

racket

erlang

elixir

pythondata

postgresql

cangjie

Algorithms

Given a positive integer <code>n</code>, generate an <code>n x n</code> <code>matrix</code> filled with elements from <code>1</code> to <code>n2</code> in spiral order.

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

Example 2:

<pre>
Input: n = 1
Output: [[1]]
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= n &lt;= 20</code></li>
</ul>

generateMatrix

Spiral Matrix II

Spiral Matrix

spiral-matrix

螺旋矩阵

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

给你一个正整数 <code>n</code> ，生成一个包含 <code>1</code> 到 <code>n2</code> 所有元素，且元素按顺时针顺序螺旋排列的 <code>n x n</code> 正方形矩阵 <code>matrix</code> 。

 

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

示例 2：

<pre>
输入：n = 1
输出：[[1]]
</pre>

 

提示：

<ul>
	<li><code>1 <= n <= 20</code></li>
</ul>