0502.php

<?php

$n = 4;
echo (-1) * $n;

function invert(array $a): array
{
    var_dump($a);
    $b = array();
    foreach ($a as $key => $value) {
        array_push($b, ($value * -1));
    }
    return $b;
}
var_dump(invert([1, 2, -3, -4, 5, -6]));

echo "<br>--------------<br>";
function points(array $games): int
{
    $points = 0;
    foreach ($games as $key => $value) {
        // echo $value;
        $ar = str_split($value, 1);
        if ($ar[0] > $ar[2]) {
            $points += 3;
        } elseif ($ar[0] < $ar[2]) {
            $points += 0;
        } else {
            $points += 1;
        }
    }
    return $points;
}
echo points(['1:0', '2:0', '3:0', '4:4', '2:2', '3:3', '1:4', '2:3', '2:4', '3:4']);