import java.util.Scanner;

class Main {
	final static int K = 30; //供託金

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		int sum = 0;
		int ans = 0;
		int[] c = new int[n];
		for(int i=0; i<n; i++) {
			c[i] = in.nextInt();
			sum += c[i];
		}

		for(int i=0; i<n; i++) {
			if(c[i] <= sum / 10) {
				ans += K;
			}
		}

		System.out.println(ans);
	}
}