#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <utility>
#include <cstring>
using namespace std;

#define rep(i,n) for(int i=0; i<n; i++)
typedef long long ll;

int main() {
	int n;
	cin >> n;
	vector<int> c(n);
	ll sum = 0;
	rep(i,n) {
		cin >> c[i];
		sum += c[i];
	}
	int res = 0;
	rep(i, n) {
		if(c[i]*10 <= sum) {
			res += 30;
		}
	}
	cout << res << endl;
	return 0;
}