import java.util.*;

public class Main {
	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];
		}
		
		sum = sum / 10;
		
		int cnt = 0;
		
		for(int i = 0; i < N; i++) {
			if(C[i] <= sum) {
				cnt+=30;
			}
		}
		
		System.out.println(cnt);
	}
}