import java.util.Scanner;


public class Main_yukicoder191 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int[] c = new int[n];
        int sum = 0;
        for (int i = 0; i < n; i++) {
        	c[i] = sc.nextInt();
        	sum += c[i];
        }

        int ret = 0;
        int lim = sum / 10;
        for (int i = 0; i < n; i++) {
        	if (c[i] <= lim) {
        		ret += 30;
        	}
        }
        
        System.out.println(ret);
        
        sc.close();
    }
}