advent_of_code_2021/day_6/part_1.php

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2021-12-06 16:37:21 +01:00
<?php
$timers = explode(',', file_get_contents('./input.txt'));
echo sprintf('Initial state: %s', implode(',', $timers));
for ($i = 0; $i < 80; $i++) {
for($t = 0, $l = count($timers); $t < $l; $t++) {
if ($timers[$t] > 0) {
$timers[$t]--;
} else {
$timers[$t] = 6;
$timers[] = 8;
}
}
echo sprintf('After %u day(s): %s%s', $i + 1, implode(',',$timers), "\n");
}
echo count($timers);