Submission #6990475

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Source Code Expand

<?php
fscanf(STDIN, '%d', $n);
$v = array_map('intval', explode(' ', trim(fgets(STDIN))));
$q = new SplPriorityQueue();
for($i = 0; $i < $n; $i++) {
    $q->insert($v[$i], -$v[$i]);
}
while ($q->count() > 1) {
    $x = $q->extract();
    $y = $q->extract();
    $z = ($x + $y) / 2;
    $q->insert($z, -$z);
}
$ans = $q->extract();
echo $ans . PHP_EOL;

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