$re = '/^([^"\' #]){24}"(?1){11}i%n(?1){4}2\*n-(?1){4}i%n(?1){10}i\/n(\)\/\/1)(?1){5}(?2)(?1){3}2\*\(i%n\)(?1){4}[int()2\/]{16}for i in range\(j,(?1){4}\]\)(?1){6}\"\*n\)$/';
$str = 'n=int(input());j=0;exec("print([(j-+i%n-n++2*n-0,j+i%n+1)[1&int(i/n)//1^(0x1)//1]*(2*(i%n)*0+2222222//2222222)for i in range(j,j+n)]);j+=n;"*n)';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php