#Write a program that calculates the total cost of amusement park 
#ticket.

#Input: full price of the ticket (float) and age of the person 
#(integer).

#Output: Total price after discount is taken

#Ticket Price Rules:

#    age 0-5: free
#    age 6 - 18: 25% discount
#    19 and older: full price

#Assume that input is valid.

#Input

age=int(input("enter age "))
price=float(input("enter price "))

#Assuming the Input is VALID in this solution
if(age<=5):
	final=0
elif(age<=18):
	final=price-price*25/100 
	#or you can write: final=price*75/100
else:
	final=price

print("final price is", format(final,".2f"))