package m.shin;
import java.util.Scanner;
public class Con191 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int N = s.nextInt() , total = 0 , money = 0;;
		int[] C = new int[N];
		for(int i = 0;i < N;i++){
			C[i] = s.nextInt();
			total += C[i];
		}
		s.close();
		total /= 10;
		for(int i = 0;i < N;i++){
			if(C[i] <= total){
				money += 30;
			}
		}
		System.out.println(money);

	}

}