#include <iostream>
#include <vector>
using namespace std;

int main()
{
	int N, sum = 0, depo = 0;
	cin >> N;
	vector<int> C(N);
	for (int i = 0; i < N; i++) {
		cin >> C[i];
		sum += C[i];
	}
	for (int i = 0; i < N; i++) {
		if (C[i] * 10 <= sum) {
			depo += 30;
		}
	}
	cout << depo << endl;
	return 0;
}