import java.util.Arrays;
import java.util.Scanner;
public class No0191 {
	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];
		}
		Arrays.sort(c);
		int kyou = 0;
		for(int i=0; i<n; i++){
			if(c[i] <= sum/10){
				kyou += 30;
			}else{
				break;
			}
		}
		System.out.println(kyou);
	}
}