group-anagrams

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Algorithms

Given an array of strings <code>strs</code>, group the anagrams together. You can return the answer in any order.

&nbsp;
Example 1:

<div class="example-block">
Input: strs = [&quot;eat&quot;,&quot;tea&quot;,&quot;tan&quot;,&quot;ate&quot;,&quot;nat&quot;,&quot;bat&quot;]

Output: [[&quot;bat&quot;],[&quot;nat&quot;,&quot;tan&quot;],[&quot;ate&quot;,&quot;eat&quot;,&quot;tea&quot;]]

Explanation:

<ul>
	<li>There is no string in strs that can be rearranged to form <code>&quot;bat&quot;</code>.</li>
	<li>The strings <code>&quot;nat&quot;</code> and <code>&quot;tan&quot;</code> are anagrams as they can be rearranged to form each other.</li>
	<li>The strings <code>&quot;ate&quot;</code>, <code>&quot;eat&quot;</code>, and <code>&quot;tea&quot;</code> are anagrams as they can be rearranged to form each other.</li>
</ul>
</div>

Example 2:

<div class="example-block">
Input: strs = [&quot;&quot;]

Output: [[&quot;&quot;]]
</div>

Example 3:

<div class="example-block">
Input: strs = [&quot;a&quot;]

Output: [[&quot;a&quot;]]
</div>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= strs.length &lt;= 104</code></li>
	<li><code>0 &lt;= strs[i].length &lt;= 100</code></li>
	<li><code>strs[i]</code> consists of lowercase English letters.</li>
</ul>

groupAnagrams

Group Anagrams

Valid Anagram

valid-anagram

有效的字母异位词

Group Shifted Strings

group-shifted-strings

移位字符串分组

Find Resultant Array After Removing Anagrams

find-resultant-array-after-removing-anagrams

移除字母异位词后的结果数组

Count Anagrams

count-anagrams

统计同位异构字符串数目

Array

Hash Table

String

Sorting

给你一个字符串数组，请你将 字母异位词 组合在一起。可以按任意顺序返回结果列表。

&nbsp;

示例 1:

<div class="example-block">
输入: strs = ["eat", "tea", "tan", "ate", "nat", "bat"]

输出: [["bat"],["nat","tan"],["ate","eat","tea"]]

解释：

<ul>
	<li>在 strs 中没有字符串可以通过重新排列来形成 <code>"bat"</code>。</li>
	<li>字符串 <code>"nat"</code> 和 <code>"tan"</code> 是字母异位词，因为它们可以重新排列以形成彼此。</li>
	<li>字符串 <code>"ate"</code>&nbsp;，<code>"eat"</code>&nbsp;和 <code>"tea"</code> 是字母异位词，因为它们可以重新排列以形成彼此。</li>
</ul>
</div>

示例 2:

<div class="example-block">
输入: strs = [""]

输出: [[""]]
</div>

示例 3:

<div class="example-block">
输入: strs = ["a"]

输出: [["a"]]
</div>

&nbsp;

提示：

<ul>
	<li><code>1 &lt;= strs.length &lt;= 104</code></li>
	<li><code>0 &lt;= strs[i].length &lt;= 100</code></li>
	<li><code>strs[i]</code>&nbsp;仅包含小写字母</li>
</ul>