#include <iostream>
#include <vector>
using namespace std;
int main()
{
	vector<int> ar;
	int a,b=0,c=0;
	cin >> a;
	ar.resize(a);
	for (int i = a-1; i >= 0; --i)
	{
		cin >> ar.at(i);
		b += ar.at(i);
	}
	
	for (int i = 0; i < a; i++)
	{
		if (ar.at(i) <= b / 10)
		{
			c += 30;
		}
	}

	cout << c << endl;
	return 0;
}