【leetcode刷题】T67-字母异位词分组

输入: ["eat", "tea", "tan", "ate", "nat", "bat"],
输出:
[
  ["ate","eat","tea"],
  ["nat","tan"],
  ["bat"]
]

class Solution(object):
    def groupAnagrams(self, strs):
        """
        :type strs: List[str]
        :rtype: List[List[str]]
        """
        d = {}
        for s in strs:
            s_sort = ''.join(sorted(s))
            if s_sort not in d:
                d[s_sort] = []
            d[s_sort].append(s)
        return list(d.values())

class Solution {
public:
    vector<vector<string>> groupAnagrams(vector<string>& strs) {
        vector<vector<string>> res;
        map<string, vector<string>> d;
        for(auto str: strs){
            string tmp = str;
            sort(tmp.begin(), tmp.end());
            d[tmp].push_back(str);
        }
        map<string, vector<string>>::iterator it;
        for(it=d.begin(); it!=d.end(); it++){
            res.push_back(it->second);
        }
        return res;
    }
};