#Mini Quiz solution

price=int(input("price "))
age=int(input("age "))
tax=int(input("tax "))

if(age<=5):
	disc=100
elif(age<=18):
	disc=25
else:
	disc=0

pre_tax=price-price*disc/100
final=pre_tax+pre_tax*tax/100

#wrong: final=price-price*disc/100+price*tax/100
#to fix it: final=price-price*disc/100+(price-price*disc/100)*tax/100

print(final)

#Test 1: price=100, age=3, tax=7, final=0
#Test 2: price=100, age=6, tax=7, (100-25*100/100)*1.07=80.25
#Test 3: price=100, age=19, tax=7, 100*1.07=107
#Test 4: price=100, age=5, tax=7 , 0
#Test 5: price=100, age=18, tax=7 (100-25*100/100)*1.07=80.25