#Grade Calculater 
print("Welcome to Grade Calculator")
marks = int(input("enter your marks : "))
print("")
if marks>100:
  print("Mistake in marks calculating !!")
else:
  if marks<32:
    print("Your grade is F ")
  elif marks>=32 and marks<50:
    print("Your grade is D")
  elif marks>=50 and marks<75:
    print("Your grade is C")
  elif marks>=75 and marks<85:
    print("Your grade is B")
  elif marks>=85 and marks<95:
    print("Your grade is A")
  elif marks>=95 and marks<=100:
    print("Your grade is A+")