[Leetcode]49. Group Anagrams

📄 Description

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 <= 104

0 <= strs[i].length <= 100

strs[i] consists of lowercase English letters.

💻 My Submision

class Solution:
    def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
        anagrams=defaultdict(list)
        
        for word in strs:
            anagrams[''.join(sorted(word))].append(word)
        
        return anagrams.values()

💡 What I learned

sort()関数は、リストだけでなく、文字列、数値もソートできます.
References

https://leetcode.com/problems/group-anagrams/

Pythonアルゴリズムインタビュー(95種類のアルゴリズム問題で完成した符号化テスト)、朴相吉知音