29 lines
685 B
PHP
29 lines
685 B
PHP
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<?php
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// je récupère la map de base
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$map = array_map('str_split', explode("\n", file_get_contents('input.txt')));
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$height = count($map);
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$length = count($map[0]);
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// je la multiplie pour qu'elle soit complète
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$multiply_by = ceil($height / $length) * 4;
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array_walk($map, static function(&$row) use ($multiply_by) {
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$row = str_split(str_repeat(implode('', $row), $multiply_by));
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});
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$height = count($map);
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$length = count($map[0]);
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// je la visite et compte les arbres
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$right = 0;
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$down = 0;
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$count_trees = 0;
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while ($right < $length && $down < $height) {
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if ($map[$down][$right] === '#') {
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$count_trees++;
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}
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$right += 3;
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++$down;
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}
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echo $count_trees;
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