void RootTutorial1_2022_answer(){


	//->
	TFile *f = new TFile("zjet_unrec.root", "read");	
	//->
	TTree* t = (TTree*)f->Get("Tdata");

	//->
	TH1F* h = new TH1F("h", "Z boson mass", 100, 0, 150);

	//->
	vector<int> *id = 0;
	vector<double> *m = 0;
	vector<double> *px = 0;
	vector<double> *py = 0;
	vector<double> *pz = 0;
	vector<double> *E = 0;


	//->
	t->SetBranchAddress("id",&id);
	t->SetBranchAddress("m",&m);
	t->SetBranchAddress("px",&px);
	t->SetBranchAddress("py",&py);
	t->SetBranchAddress("pz",&pz);
	t->SetBranchAddress("En",&E);


	//->
	int NEntries = t->GetEntries();
	for(int i = 0; i< NEntries;i++){

		t->GetEntry(i);

		for ( int iObj = 0; iObj < (*id).size(); ++iObj ) {
		
		}

		

	}
	
	return;
}