class Student():
    def __init__(self):
        self.name=input()
         self.roll_no=input()
         self.marks=[int(i) for i in input('enter the marks obtained in three subj
     def Display(self):
         print('Name:',self.name)
         print('Roll no:',self.roll_no)
         print('Total marks:',sum(self.marks))
a1=Student()
a1.Display()