import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        int N = Integer.parseInt(reader.readLine());
        String[] inputs = reader.readLine().split(" ");
        long[] votes = new long[N];
        long sum = 0;
        for (int i = 0; i < N; i++) {
            long v = Long.parseLong(inputs[i]);
            votes[i] = v;
            sum += v;
        }
        double criteria = sum/ 10.0;
        long money = 0;
        for (int i = 0; i < N; i++) {
            if (votes[i] > criteria) {

            } else {
                money += 30;
            }
        }
        System.out.println(money);
    }
}