#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;

int main(void){
	int n;cin >> n;
	ll sum = 0;
	ll t = 0;
	vector<int> c(n);
	for(int i=0;i<n;i++){
		cin >> c[i];
		t += c[i];
	}

	for(int i=0;i<n;i++){
		if(t/10. >= c[i]){
			sum += 30;
		}
	}
	cout << sum << endl;
	return 0;
}