#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;

int main() {
	int n;

	cin >> n;
	vector<int> c(n, 0);
	int total = 0;
	for (int i = 0; i < n; i++) {
		cin >> c[i];
		total += c[i];
	}

	int mini = total / 10;
	int ans = 0;
	for (int i = 0; i < n; i++) {
		if (c[i] <= mini) {
			ans += 30;
		}
	}

	cout << ans << endl;
	return 0;
}