#include <iostream>
using namespace std;

int main(){
	int N;
	int C[100];
	int criteria = 0;
	int sum = 0;
	cin >> N;
	for (int i = 0; i < N; i++){
		cin >> C[i];
		criteria += C[i];
	}
	criteria /= 10;

	for (int i = 0; i < N; i++){
		sum += (C[i] <= criteria ? 30 : 0);
	}

	cout << sum << endl;
	
	return 0;
}