R__LOAD_LIBRARY(/nica/mpd21/parfenov/mpd_winter2019/winter_scripts/build_test/PicoDst/libPicoDst.so)

void test_Ids()
{
  TFile *fi = new TFile("test_picodst.root","read");
  TTree *tree = (TTree*) fi->Get("picodst");
  TClonesArray *recoTracks = nullptr;
  TClonesArray *mcTracks = nullptr;
  tree->SetBranchAddress("mctracks",&mcTracks);
  tree->SetBranchAddress("recotracks",&recoTracks);
  for (int iEv=0; iEv<tree->GetEntriesFast(); iEv++)
  { 
    tree->GetEntry(iEv); 
    for (int i=0; i<recoTracks->GetEntriesFast(); i++)
    { 
      auto recoTrack = (PicoDstRecoTrack*) recoTracks->UncheckedAt(i); 
      auto mcTrack = (PicoDstMCTrack*) mcTracks->UncheckedAt(recoTrack->GetMcId()); 
      if (recoTrack->GetInitialMcId() != mcTrack->GetInitialId()) 
        std::cout << "Event " << iEv << ", recotrack " << i << ": InitMcId(reco)= " << recoTrack->GetInitialMcId() << ", InitMcId(mc)= " << mcTrack->GetInitialId() << ", McId= " << recoTrack->GetMcId() << std::endl; 
    } 
  }
}