find-the-difference

java

python

python3

mysql

mssql

oraclesql

csharp

javascript

typescript

bash

swift

kotlin

dart

golang

ruby

scala

rust

racket

erlang

elixir

pythondata

postgresql

cangjie

Algorithms

You are given two strings <code>s</code> and <code>t</code>.

String <code>t</code> is generated by random shuffling string <code>s</code> and then add one more letter at a random position.

Return the letter that was added to <code>t</code>.

&nbsp;
Example 1:

<pre>
Input: s = &quot;abcd&quot;, t = &quot;abcde&quot;
Output: &quot;e&quot;
Explanation: &#39;e&#39; is the letter that was added.
</pre>

Example 2:

<pre>
Input: s = &quot;&quot;, t = &quot;y&quot;
Output: &quot;y&quot;
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>0 &lt;= s.length &lt;= 1000</code></li>
	<li><code>t.length == s.length + 1</code></li>
	<li><code>s</code> and <code>t</code> consist of lowercase English letters.</li>
</ul>

findTheDifference

Find the Difference

Single Number

single-number

只出现一次的数字

Permutation Difference between Two Strings

permutation-difference-between-two-strings

两个字符串的排列差

Bit Manipulation

Hash Table

String

Sorting

给定两个字符串 <code>s</code> 和 <code>t</code>&nbsp;，它们只包含小写字母。

字符串 <code>t</code>&nbsp;由字符串 <code>s</code> 随机重排，然后在随机位置添加一个字母。

请找出在 <code>t</code>&nbsp;中被添加的字母。

&nbsp;

示例 1：

<pre>
输入：s = "abcd", t = "abcde"
输出："e"
解释：'e' 是那个被添加的字母。
</pre>

示例 2：

<pre>
输入：s = "", t = "y"
输出："y"
</pre>

&nbsp;

提示：

<ul>
	<li><code>0 &lt;= s.length &lt;= 1000</code></li>
	<li><code>t.length == s.length + 1</code></li>
	<li><code>s</code> 和 <code>t</code> 只包含小写字母</li>
</ul>