【算法】【字符串】Leetcode哈希表相关高频面试题 字母异位词分组

题目链接：https://leetcode-cn.com/problems/group-anagrams/

class Solution {
public:
    vector<vector<string>> groupAnagrams(vector<string>& strs) {
        unordered_map<string, int> hashmap;
        vector<vector<string>> res;
        for(auto str : strs)
        {
            auto tmp = str;
            sort(tmp.begin(), tmp.end());
            if(hashmap.count(tmp))
            {
                res[hashmap[tmp]].push_back(str);
            }
            else
            {
                hashmap[tmp] = res.size();
                res.push_back({str});
            }
        }
        return res;
    }
};