CoC d'entraînement à PHP

<?php

//fscanf(STDIN, "%d", $n);

$snakes = array();
$snakes[0] = '>-rrrrr';
$snakes[1] = 'rrrrr-<';
$snakes[2] = '-<rrrrr';
$n = 3;

var_dump($snakes);

$happy_snakes_count = 0;

for ($i = 0; $i < $n; $i++) {
    $snake = $snakes[$i];
    $len_snake = strlen($snake);
//    $snake = stream_get_line($line, 25 + 1, "\n");
    $right_tail = strpos($snake, "-<") == strlen($snake) - 2;
    $left_tail = strpos($snake, ">-") == 0;
    if ($right_tail || $left_tail)
        $happy_snakes_count += 1;
}
$pct = round(100 * $happy_snakes_count / $n);
print("$pct%")
?>