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<?php $i = 50; while ($i > 0): $power = 1; $bin = array(); if ($i / pow(2,$power) != 0) { $bin[$power - 1] = 1; $i = $i - pow(2,$power); } else $bin[$power - 1] = 0; $power++; endwhile; print $bin; ?>

preferences:
38.08 ms | 402 KiB | 5 Q