import java.util.*; public class Main { static Scanner sc = new Scanner(System.in); public static void main(String[] args) { int n = sc.nextInt(); int[] ar = new int[n]; int standard = 0; for (int i=0; i<n; i++) { ar[i] = sc.nextInt(); standard += ar[i]; } standard /= 10; int money = 0; for (int i=0; i<n; i++) { if (ar[i]<=standard) {money++;} } System.out.println(money*30); } }