<?php
    $n = trim(fgets(STDIN));
    $list = explode(" ",trim(fgets(STDIN)));
    $bosh = 0;
    for($i = 0; $i < $n; $i++){
        if($list[$i] <= array_sum($list) / 10 ){
            $bosh = $bosh + 30;
        }
    }
    echo $bosh;

?>