#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <limits.h>
#include <vector>
#include <numeric>
using namespace std;

int main(){
	int n;
	int vote[100];
	int sum = 0;
	int ans = 0;
	cin >> n;
	
	for(int i=0; i<n; i++){
		cin >> vote[i];
		sum += vote[i];
	}
	
	for(int i=0; i<n; i++){
		if(vote[i] <= sum/10){
			ans += 30;
		}
	}
	
	cout << ans << endl;
	return 0;
}