#include <iostream>
using namespace std;

#define rep(i, n) for (int i = 0; i < n; i++)
#define MAX 100

int main()
{
	int n, C[MAX];
	cin >> n;

	int sum_C = 0;
	rep(i, n)
	{
		cin >> C[i];
		sum_C += C[i];
	}

	int ans = 0;
	rep(i, n)
	{
		if (C[i] * 10 <= sum_C)
		{
			ans += 30;
		}
	}
	cout << ans << endl;
}