package no191;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int sum = 0;
		int[] c = new int[n];
		for(int i=0;i<n;i++) {
			c[i] = sc.nextInt();
			sum += c[i];
		}
		long ans = 0;
		for(int i=0;i<n;i++) {
			if (c[i] * 10 <= sum) {
				ans += 30;
			}
		}
		System.out.println(ans);
	}

}