#include <iostream>

int main(){
	int n, sum = 0, ans = 0;
	int c[101];
	std::cin >> n;
	for (int i = 0; i < n; ++i)std::cin >> c[i], sum += c[i];
	for (int i = 0; i < n; ++i)if (c[i] <= sum / 10.0)ans += 30;
	std::cout << ans << std::endl;
	return 0;
}