{
  gROOT->SetStyle("Plain");
  TRandom r1;
  TRandom3 r2;
  r1.SetSeed(123456);
  r2.SetSeed(123456);

  unsigned long entries[] = {1000, 100000, 1000000};
  const int n = 3;
  for(int j = 0; j < n; ++j) {
    std::ostringstream out;
    out << entries[j];
    string tag = out.str();
    
    auto_ptr<TH1> h1(new TH1D((string("h1_")+tag).c_str(), (string("TRandom, ")+tag+string(" entries")).c_str(), 100, 0, 1));
    auto_ptr<TH1> h2(new TH1D((string("h2_")+tag).c_str(), (string("TRandom3, ")+tag+string(" entries")).c_str(), 100, 0, 1));
    
    for(unsigned long i = 0; i < entries[j]; ++i) {
      h1->Fill(r1.Uniform());
      h2->Fill(r2.Uniform());
    }
    
    TCanvas c;
    h1->SetMinimum(0.0);
    h1->Draw();
    c.SaveAs((string("01-rndTRandom2-")+tag+string(".pdf")).c_str());
    h2->SetMinimum(0.0);
    h2->Draw();
    c.SaveAs((string("01-rndTRandom3-")+tag+string(".pdf")).c_str());
  }

}