mirror of
https://github.com/prdlk/leetcode.git
synced 2026-09-16 23:16:26 +00:00
67 lines
1.4 KiB
Python
67 lines
1.4 KiB
Python
"""
|
|
49. Group Anagrams
|
|
Difficulty: Medium
|
|
https://leetcode.com/problems/group-anagrams/
|
|
|
|
──────────────────────────────────────────────────
|
|
|
|
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 <= 10^4
|
|
|
|
• 0 <= strs[i].length <= 100
|
|
|
|
• strs[i] consists of lowercase English letters.
|
|
"""
|
|
|
|
from collections import defaultdict
|
|
|
|
|
|
class Solution:
|
|
def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
|
|
if not strs:
|
|
return strs
|
|
res = defaultdict(list)
|
|
for s in strs:
|
|
count = [0] * 26
|
|
for c in s:
|
|
count[ord(c) - ord("a")] += 1
|
|
res[tuple(count)].append(s)
|
|
|
|
return res.values()
|