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LeetCode题解(python)
49. 字母异位词分组
题目描述
给定一个字符串数组,将字母异位词组合在一起。字母异位词指字母相同,但排列不同的字符串。
示例:
输入: ["eat", "tea", "tan", "ate", "nat", "bat"],
输出:
[
["ate","eat","tea"],
["nat","tan"],
["bat"]
]
解题心得
依次遍历元素
排序字符串
查找是否已经有匹配项,若有,添加原字符串,反之,加上新字符串
解题代码
from collections import defaultdict
class Solution:
def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
rel = defaultdict(list)
for i in strs:
s = i
s_order = "".join(sorted(i))
rel[s_order].append(i)
return list(rel.values())