text: __author__ = 'Shahbaz_Akhtar'
  year=int(input("Enter a year : "))
  if(year % 4 ==0):
      if(year % 100 ==0):
          if(year % 400 ==0):
              print("leap year")
          else:
              print("Not a leap year")
      else:
          print("leap year")
  else:
      print("not a leap year")
  