力扣题-11.30

[力扣刷题攻略] Re：从零开始的力扣刷题生活

力扣题1：49. 字母异位词分组

解题思想：将单词进行排序之后通过哈希表进行返回

class Solution(object):
    def groupAnagrams(self, strs):
        """
        :type strs: List[str]
        :rtype: List[List[str]]
        """
        mp = collections.defaultdict()

        for st in strs:
            key = "".join(sorted(st))
            if key in mp:
                mp[key].append(st)
            else:
                mp[key] = [st]
        return list(mp.values())

class Solution {
public:
    vector<vector<string>> groupAnagrams(vector<string>& strs) {
        std::unordered_map<std::string, std::vector<std::string>> mp;

        for (const std::string& st : strs) {
            std::string key = st;
            std::sort(key.begin(), key.end());

            if (mp.find(key) != mp.end()) {
                mp[key].push_back(st);
            } else {
                mp[key] = {st};
            }
        }

        std::vector<std::vector<std::string>> result;
        for (const auto& entry : mp) {
            result.push_back(entry.second);
        }

        return result;
    }
};