#Version 2

num=int(input("enter number of people "))
total=0
c0=0
c10=0
c20=0
total_discount=0

if(num>0):
	for i in range(num):
		pounds=int(input("enter number of pounds "))
		price=float(input("price per pound "))
		if(pounds<=5):
			total=total+pounds*price
			c0=c0+1
			discount=0
		elif(pounds<=10):
			total=total+(pounds*price - pounds*price*10/100)
			c10=c10+1
			discount=10
		else:
			total=total+(pounds*price - pounds*price*20/100)
			c20=c20+1
			discount=20
		total_discount=total_discount+discount
	print("total price", total)
	print("average discount", total_discount/num)
	print(c0,"didnt get any discount")
	print(c10,"got 10%")
	print(c20,"got 20%")	

else:
	print("no people came to the store today")