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];
        for (int i = 0; i < n; i++) {
            c[i] = sc.nextInt();
        }
        int sum = 0;
        for (int v : c) {
            sum += v;
        }
        int ans = 0;
        for (int p : c) {
            if (p <= sum / 10) {
                ans += 30;
            }
        }
        System.out.println(ans);
    }
}