#include <iostream>
#include <vector>
using namespace std;
int main(void) {
	int n;
	cin >> n;
	vector<int> c(n);
	int sum = 0;
	for (int i = 0; i < n; ++i) {
		cin >> c[i];
		sum += c[i];
	}
	int ans = 0;
	for (int i = 0; i < n; ++i) {
		if (c[i] <= sum / 10.0)
			ans += 30;
	}
	cout << ans << endl;
	return 0;
}