Day 29: Bitwise AND

https://www.hackerrank.com/challenges/30-bitwise-and/problem

<?php
$stdin = fopen("php://stdin", "r");

fscanf($stdin, "%d\n", $t);

for ($t_itr = 0; $t_itr < $t; $t_itr++) {
    fscanf($stdin, "%[^\n]", $nk_temp);
    $nk = explode(' ', $nk_temp);

    $n = intval($nk[0]);

    $k = intval($nk[1]);

    if( ($k-1 | $k) <= $n ){
        echo ($k-1)."\n";
    } else {
        echo ($k-2)."\n";
    }
    
}

fclose($stdin);