#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	int  N;
	long long C[105], sum = 0;;
	cin >> N;
	for (int i = 0; i < N; i++) {
		cin >> C[i];
		sum += C[i];
	}
	
	long long ans = 0;
	for (int i = 0; i < N; i++) {
		if (C[i]*10 <= sum) {
			ans += 30;
		}
	}

	cout << ans << endl;

	return 0;
}