import java.io.*;
import java.util.*;
import java.math.*;

class Main191 {
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(br.readLine());
		String[] str = new String[n];
		str = br.readLine().split(" ");
		int[] nums = new int[n];
		int sum = 0, ans = 0;
		for (int i = 0; i < n; i++) {
			nums[i] = Integer.parseInt(str[i]);
			sum += nums[i];
		}
		for (int m : nums) {
			if (m <= (double)sum / 10.0) ans += 30;
		}
		System.out.println(ans);
	}
}