//
void SetUp(){
  gROOT->SetStyle("Plain");
  gROOT->ForceStyle();
  gStyle->SetOptStat(0);
  gStyle->SetOptFit(111);
  gStyle->SetHistLineColor(6);
  gStyle->SetStatStyle(0);
  gStyle->SetStatTextColor(4);
  gStyle->SetTitleH(0.09);
  gStyle->SetTitleW(0.785);
  gStyle->SetTitleX(.2);
  gStyle->SetTitleY(1.0);
  gStyle->SetTitleStyle(0);
  gStyle->SetTitleFontSize(0.09);
  gStyle->SetLabelFont(33,"X");
  gStyle->SetLabelSize(20,"X");
  gStyle->SetTitleOffset(2.75,"X");
  gStyle->SetTitleFont(33,"X");
  gStyle->SetTitleSize(10,"X");
  gStyle->SetLabelFont(33,"Y");
  gStyle->SetLabelSize(20,"Y");
  gStyle->SetTitleOffset(1.,"Y");
  gStyle->SetTitleFont(33,"Y");
  gStyle->SetTitleSize(20,"Y");
  gStyle->SetLabelFont(63,"Z");
  gStyle->SetLabelSize(20,"Z");
  gStyle->SetNdivisions(503,"X");
  gStyle->SetNdivisions(505,"Y");
  gStyle->SetOptStat(0);
  gStyle->SetOptFit(111);
  gStyle->SetStatY(0.9);
  gStyle->SetStatX(1.02);
  gStyle->SetStatW(0.3);
  gStyle->SetStatH(0.35);
  gStyle->SetStatFontSize(0.03);
  gStyle->SetStatBorderSize(0);
  gStyle->SetFitFormat("7.3f");

}
//
void test(){
  SetUp();
  // 
  TFile* f1reco = new TFile("../MonteCarlo/RECOcands/signalmc.root");
  f1reco->cd("B0Cand");
  TTree* mc_reco = (TTree*)gDirectory->Get("B0KstMuMuNTuple");
  //
  TH1D* h1= new TH1D("h1","bMass from Signal MC",40,5.1,5.5);
  TH1D* h11= new TH1D("h11","bMass",40,5.1,5.5);
  //
  //
  Double_t bMass;
  //
  mc_reco->SetBranchAddress("bMass",&bMass);
  for (Int_t i=0; i<mc_reco->GetEntries(); i++) {
    mc_reco->GetEntry(i);
    h11->Fill(bMass);
  }
  //
  //
  TCanvas *c0=new TCanvas("c0","",800,800);c0->Divide(2,2);
  c0->cd(1);
  gPad->SetBottomMargin(0.06);
  gPad->SetLeftMargin(0.2);
  gPad->SetRightMargin(0.01);
  mc_reco->Draw("bMass>>h1 ");
  h1->SetLineColor(2);
  h1->SetLineStyle(1);
  h1->SetLineWidth(2);
  h1->Draw();
  //
  c0->cd(2);
  gPad->SetBottomMargin(0.06);
  gPad->SetLeftMargin(0.2);
  gPad->SetRightMargin(0.01);
  h11->SetLineColor(2);
  h11->SetLineStyle(1);
  h11->SetLineWidth(2);
  h11->Draw();

}