Leetcode 49 Solution

This article provides solution to leetcode question 49 (group-anagrams)
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https://leetcode.com/problems/group-anagrams

Solution

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

        for (auto str : strs)
        {
            auto key = str;
            sort(key.begin(), key.end());
            m[key].push_back(str);
        }

        vector<vector<string>> res;
        for (auto pair : m)
            res.push_back(pair.second);
        return res;
    }
};