f3.SetCompressionLevel(2);
TTree * treeh3 = new TTree("DelataH","DeltaH");
TClonesArray *arrd = new TClonesArray("AliTPChitD",100);
f3.SetCompressionLevel(2);
TTree * treeh3 = new TTree("DelataH","DeltaH");
TClonesArray *arrd = new TClonesArray("AliTPChitD",100);