package yukicoder191;
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		long[] c=new long[n];
		long sum=0;
		long kyo=0;
		for(int i=0;i<n;i++){
			c[i]=sc.nextLong();
			sum+=c[i];
		}
		for(int i=0;i<n;i++){
			if(10*c[i]<=sum)kyo+=30;
		}
		
		System.out.println(kyo);
		
	}
}