#include <iostream>
#include <algorithm>
using namespace std;
 
int main(){
	int N;
	cin >> N;
	int C[N];
	int all = 0;
	for(int i = 0; i < N; i++){
		cin >> C[i];
		all += C[i];
	}
	int ans = 0;
	for(int i = 0; i < N; i++){
		if(C[i] * 10 <= all){
			ans += 30;
		}
	}
	cout << ans << endl;
}