import java.util.Scanner;
	

public class Main{
	
	
	public static void main(String args[])throws Exception{
		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];
		}
		int ans = 0;
		for(int i=0;i<N;i++){
			if(C[i]*10<=sum){
				ans += 30;
			}
		}System.out.println(ans);
	}
	

}