import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int N = sc.nextInt();
		int[] arr = new int[N];
		int sum = 0;
		for(int i = 0; i < N; i++){
			arr[i] = sc.nextInt();
			sum += arr[i];
		}
		
		int count = 0;
		for(int i = 0; i < N; i++){
			if(arr[i] * 10 <= sum){
				count += 30;
			}
		}
		
		System.out.println(count);
		
	}
	
}