24 lines
641 B
PHP
24 lines
641 B
PHP
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<?php
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$timers = array_map('intval', explode(',', file_get_contents('./input.txt')));
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echo sprintf('Initial state: %s', implode(',', $timers));
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$timers = array_count_values($timers);
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for ($i = 0; $i < 256; $i++) {
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$tmp = array_fill(0, 9, 0);
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foreach ($timers as $number => $count) {
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if($number > 0) {
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$tmp[$number-1] += $count;
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} else {
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$tmp[6] += $count;
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$tmp[8] += $count;
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}
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}
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$timers = $tmp;
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echo sprintf('After %u day(s): %s with %u zero%s', $i + 1, array_sum($timers), (array_key_exists(0, $timers) ? $timers[0] : 0), "\n");
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}
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echo array_sum($timers);
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