#!/usr/bin/evn perl

use strict;
use warnings;

my $n = <>;
my $str = <>;
chomp $str;
my @array = split / /, $str;
my $sum = 0;
my $ans = 0;
foreach $_ (@array) {
	$sum += $_;
}
$sum /= 10;

for(my $i = 0; $i < $n; $i++) {
	if($array[$i] <= $sum) {
		$ans += 30;
	}
}

print "$ans\n";

exit;