func main()
	var n: int :: cui@inputInt()
	var c: []int :: #[n]int
	for i(0, n - 1)
		do c[i] :: cui@inputInt()
	end for
	
	var sum: int
	for i(0, n - 1)
		do sum :+ c[i]
	end for
	
	var ans: int
	for i(0, n - 1)
		if(c[i] * 10 <= sum)
			do ans :+ 30
		end if
	end for
	do cui@print("\{ans}\n")
end func