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

int main() {
	int n;
	cin>>n;
	long long sum=0;
	long long c[n];
	for (int i = 0; i < n; ++i) {
		cin>>c[i];
		sum=sum+c[i];
	}
	sum=sum/10;
	long long  counter=0;
	for (int i = 0; i < n; ++i) {
		if(sum>=c[i]){
			counter+=30;
		}
	}
	cout<<counter<<endl;
}