10 lines
262 B
PHP
10 lines
262 B
PHP
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<?php
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$buffer = str_split(file_get_contents('./input.txt'));
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for ($start = 0, $max = count($buffer); $start < $max; $start++) {
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$slice = array_slice($buffer, $start, 14);
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if (count(array_unique($slice)) === 14) {
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echo $start + 14; exit;
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}
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}
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