#include <iostream>
using namespace std;
int main(void)
{
	int n, c[128], s = 0, ans = 0;

	cin >> n;
	for(int i = 0;i < n; i++){
		cin >> c[i];
		s += c[i];
	}

	for(int i = 0;i < n; i++){
		if((double)c[i] <= s / 10.0)
			ans += 30;
	}

	cout << ans << endl;
}