#include<iostream>
using namespace std;
int main(void){
	int sum = 0, ans = 0, n; cin >> n;
	int v[100];
	for (int i = 0; i < n; i++){
		v[i]; cin >> v[i];
		ans += 30;
		sum += v[i];
	}
	for (int i = 0; i < n; i++){
		if (v[i] > sum / 10) ans -= 30;
	}
	cout << ans << endl;
	return 0;
}