26 lines
445 B
PHP
26 lines
445 B
PHP
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#!/usr/bin/env php
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<?php
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$input = file_get_contents("input");
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$input = explode(",", trim($input));
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$fish = array_count_values($input);
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for($i=0; $i<=10; $i++)
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if(!array_key_exists($i, $fish)) $fish[$i] = 0;
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$days = 256;
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for($day=0; $day<$days; $day++) {
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$fish[7] += $fish[0];
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$fish[9] += $fish[0];
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for($i=0; $i<10; $i++) {
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$fish[$i] = $fish[$i+1];
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}
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}
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echo "Total number of fish after $days days: " . array_sum($fish) . "\n";
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?>
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