Group Anagrams
Updated Jan 31, 2026
Problem
Given an array of strings strs, group the anagrams together. You can return the answer in any order.
An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.
Constraints
1 <= strs.length <= 10^4
0 <= strs[i].length <= 100
strs[i] consists of lowercase English letters.
Examples
Example 1
Input:
strs = ["eat","tea","tan","ate","nat","bat"]
Output:
[["bat"],["nat","tan"],["ate","eat","tea"]]
Example 2
Input:
strs = [""]
Output:
[[""]]
Example 3
Input:
strs = ["a"]
Output:
[["a"]]
Function Signature
def groupAnagrams(self, strs: list[str]) -> list[list[str]]
How to Submit
Implement a Solution class with a groupAnagrams method.
Your method will be called with the input parameters and should return the answer.