vector<string> anagrams(vector<string> &strs) {

// Start typing your C/C++ solution below

// DO NOT write int main() function

map<string, vector<string> > mp;

vector<string> ans;

string tmp;

for (int i = 0; i < strs.size(); i++) {

tmp = strs[i];

sort(tmp.begin(), tmp.end());

mp[tmp].push_back(strs[i]);

}

for (map<string, vector<string> >::iterator p = mp.begin(); p != mp.end(); p++) {

if ((p->second).size() > 1) {

for (int i = 0; i < (p->second).size(); i++) {

ans.push_back((p->second)[i]);

}

}

}

return ans;

}