import java.util.*;

class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		
		//総和の10分の1以下のものを足す
		
		int n = sc.nextInt();
		int sum = 0;
		int[] ar = new int[n];
		for (int i=0; i<n; i++) {
			int temp = sc.nextInt();
			ar[i] = temp;
			sum += temp;
		}
		
		int ans = 0;
		for (int i=0; i<n; i++) {
			if (ar[i] <= sum/10) ans += 30;
		}
		System.out.println(ans);
		
	}
}