[Leetcode] 0049. Group Anagrams

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Table of contents

Medium

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.

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"]]

Constraints:

1 <= strs.length <= 10 ⁴
0 <= strs[i].length <= 100
strs[i] consists of lowercase English letters.

Python

				
					# time complexity: O(nklogk) # space complexity: O(nk) from collections import defaultdict from typing import List class Solution: def groupAnagrams(self, strs: List[str]) -> List[List[str]]: ans = defaultdict(list) for s in strs: ans[tuple(sorted(s))].append(s) return ans.values() strs = ["eat", "tea", "tan", "ate", "nat", "bat"] print(Solution().groupAnagrams(strs))

Medium

Python

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