動機
水題~~
Problem
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 lower-case English letters.
Sol
sort後再用hash
class Solution:
def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
tbl = {}
for s in strs:
ss = tuple(sorted(s))
if ss in tbl:
tbl[ss].append(s)
else:
tbl[ss] = [s]
return list(tbl.values())