#include "leetcode.h" class Solution { public: vvd(string) groupAnagrams(vector<string> &strs) { map<array<int, 26>, vector<string>> groups; for (string s : strs) { array<int, 26> hash = {0}; for (char c : s) ++hash[c - 'a']; groups[hash].push_back(s); } vvd(string) ans; for (auto [hash, group] : groups) ans.push_back(group); return ans; } };