std::vector<std::string> fileNaming(std::vector<std::string> names) {
    set<string> mp;
    vector<string> ans;
    for(string s:names){
        int t = 0;
        string ss = s;
        while(mp.find(ss)!=mp.end())
            ss = s +"("+to_string(++t)+")";
        mp.insert(ss);
        ans.push_back(ss);
    }
    return ans;
}