49. Group Anagrams.md#13
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Added problem statement and examples for grouping anagrams.
Updated the problem statement and example outputs for clarity. Refactored the solution code to use defaultdict for better handling of anagrams.
Remove unnecessary line break in constraints section.
oda
reviewed
Feb 22, 2026
| return list(sorted_str_to_words.values()) | ||
| ``` | ||
| 見直しもしたが、意外とタイポなしでゼロから何回も書けた。 | ||
| 変数名に意味があるから、書いていてコードの意味がより理解しやすくなった気がする。 |
mamo3gr
reviewed
Feb 27, 2026
| def groupAnagrams(self, strs: List[str]) -> List[List[str]]: | ||
| key_to_char = {} | ||
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| for char in strs: |
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step2以降では修正されていますが、char だとミスリーディングですね。
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ご指摘ありがとうございますmm
たしかにそうですね。。この時、charの意味を誤解して書いていました
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特に違和感ありませんでした 👍 |
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Given an array of strings strs, group the anagrams together. You can return the answer in any order.
Example 1:
Input: strs = ["eat","tea","tan","ate","nat","bat"]
Output: [["bat"],["nat","tan"],["ate","eat","tea"]]
Explanation:
There is no string in strs that can be rearranged to form "bat".
The strings "nat" and "tan" are anagrams as they can be rearranged to form each other.
The strings "ate", "eat", and "tea" are anagrams as they can be rearranged to form each other.
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.