#include<iostream>
#include <math.h>
#include <string>
using namespace std;

int main(){
	int n;
	int c[100];
	int t = 0;
	int a = 0;
	cin >> n;
	for (int i = 0; i < n; i++){
		cin >> c[i];
		t += c[i];
	}
	for (int i1 = 0; i1 < n; i1++){
		if (c[i1] <= (t / 10)){
			a += 30;
		}
	}
	cout << a << endl;
	return 0;
}