class Solution {
public:
    vector<string> subdomainVisits(vector<string>& cpdomains) {
        unordered_map<string,int>hs;
        for(auto s:cpdomains)
        {
            size_t pos=s.find(" ");
            int num=stoi(s.substr(0,pos));
            s=s.substr(pos+1);
            while(s.size())
            {
                hs[s]+=num;
                pos=s.find(".");
                if(pos==string::npos)break;
                s=s.substr(pos+1);
            }
        }
        vector<string>res;
        for(auto s:hs)
        {
            res.push_back(to_string(s.second)+" "+s.first);
        }
        return res;
    }
};