#write a function final_price that has 3 parameters
#original price, discount % (ints)  and tax % (ints)
#function returns final price after discount and tax applied

#write function process that doesn't have any parameters
#function reads tax as integer and 
#function reads price and discount for each item, first negative value will 
#terminate the input
#function prints final price for each time
#and returns highest prices and lowest price

#write main to test your function

def final_price(price, discount, tax):
	disc_price=price-price*discount/100
	return (disc_price+tax*disc_price/100)

def process():
	tax=int(input("tax "))
	price=float(input("enter price "))
	discount=int(input("enter discount "))
	count=0
	max_price=-1
	min_price=-1
	while(price>=0 and  discount>=0):
		count+=1
		res=final_price(price, discount, tax)
		print("final price", res)
		if(count==1):
			max_price=res
			min_price=res
		else:
			if(res>max_price):
				max_price=res
			if(res<min_price):
				min_price=res
		price=float(input("enter price "))
		discount=int(input("enter discount "))
	return max_price, min_price

def main():
	max_price, min_price=process()
	if(max_price!=-1 and min_price!=-1):
		print("max price", max_price)
		print("min_price", min_price)
	else:
		print("empty input")
main()