import java.util.Scanner;

public class Main {

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

}