c++, read numbers, many lines, and different # in each line, remove redundant

read numbers

    ifstream pbinfile(argv[2]);
    
    vector<unordered_set<int> > numbers;
    while(getline(pbinfile, stemp)){
      istringstream buffer(stemp);
      vector<int> line((istream_iterator<int>(buffer)),
                       istream_iterator<int>());
      unordered_set<int> s(line.begin(), line.end());
      numbers.push_back(s);
    }