#include "DataFormats/EgammaCandidates/interface/GsfElectronCore.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/EgammaReco/interface/ElectronSeedFwd.h"
#include "DataFormats/EgammaReco/interface/ElectronSeed.h"
#include <cmath>