#include "bits/stdc++.h"
using namespace std;

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