#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<int,int>
#define LP pair<ll,ll>
using namespace std;
int main() {
	ll n;
	ll sum = 0, ans = 0;
	cin >>n;
	vector<int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		sum += a[i];
	}
	for (int i = 0; i < n; i++) {
		if (10 * a[i] <= sum) ans += 30;
	}
	cout << ans << endl;
	return 0;
}