letter-case-permutation

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 string <code>s</code>, you&nbsp;can transform every letter individually to be lowercase or uppercase to create another string.

Return a list of all possible strings we could create. Return the output in any order.

&nbsp;
Example 1:

<pre>
Input: s = &quot;a1b2&quot;
Output: [&quot;a1b2&quot;,&quot;a1B2&quot;,&quot;A1b2&quot;,&quot;A1B2&quot;]
</pre>

Example 2:

<pre>
Input: s = &quot;3z4&quot;
Output: [&quot;3z4&quot;,&quot;3Z4&quot;]
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= s.length &lt;= 12</code></li>
	<li><code>s</code> consists of lowercase English letters, uppercase English letters, and digits.</li>
</ul>

letterCasePermutation

Letter Case Permutation

Subsets

subsets

子集

Brace Expansion

brace-expansion

花括号展开

Bit Manipulation

String

Backtracking

给定一个字符串&nbsp;<code>s</code>&nbsp;，通过将字符串&nbsp;<code>s</code>&nbsp;中的每个字母转变大小写，我们可以获得一个新的字符串。

返回 所有可能得到的字符串集合 。以 任意顺序 返回输出。

&nbsp;

示例 1：

<pre>
输入：s = "a1b2"
输出：["a1b2", "a1B2", "A1b2", "A1B2"]
</pre>

示例 2:

<pre>
输入: s = "3z4"
输出: ["3z4","3Z4"]
</pre>

&nbsp;

提示:

<ul>
	<li><code>1 &lt;= s.length &lt;= 12</code></li>
	<li><code>s</code>&nbsp;由小写英文字母、大写英文字母和数字组成</li>
</ul>