quantity = float(input("Quantity >> "))
price = 99
if quantity<=9:
    print("0% Discount")
    discount = 0

elif quantity>=10 and 19>=quantity:
    print("20% discount")
    discount = .20

elif quantity >= 20 and 49 >= quantity:
    print("30% discount")
    discount = .30

elif quantity >= 50 and 99 >= quantity:
    print("40% discount")
    discount = .40

elif quantity>=100:
    print("50% discount")
    discount = .50

else:
    print("lol")

dctotal = (99 * quantity) * discount
total = (99 * quantity) - dctotal
print("Amount of discount : %5.2f" % dctotal)
print("Amount to be paid : %5.2f" % total)