@ 2014-12-10T18:15:24Z <?php
$s1 = bchexdec('44e1ff2dfd8102cf7a47c21d5c9fd5701610d04953c6836596b4fe9dd2f53e3e');
$s2 = bchexdec('9a5f1c75e461d7ceb1cf3cab9013eb2dc85b6d0da8c3c6e27e3a5a5b3faa5bab');
echo bcdechex(invmod($s1, $s2));
function invmod($a,$b) {
$n=$b;
$x=0; $lx=1; $y=1; $ly=0;
while ($b) {
$t=$b;
$q=bcdiv($a,$b,0);
$b=bcmod($a,$b);
$a=$t;
$t=$x; $x=bcsub($lx,bcmod(bcmul($q,$x),$n)); $lx=$t;
$t=$y; $y=bcsub($ly,bcmod(bcmul($q,$y),$n)); $ly=$t;
}
if (bccomp($lx,0) == -1)
$lx=bcadd($lx,$n);
return $lx;
}
function bchexdec($hex) {
if(strlen($hex) == 1) {
return hexdec($hex);
} else {
$remain = substr($hex, 0, -1);
$last = substr($hex, -1);
return bcadd(bcmul(16, bchexdec($remain)), hexdec($last));
}
}
function bcdechex($dec) {
$last = bcmod($dec, 16);
$remain = bcdiv(bcsub($dec, $last), 16);
if($remain == 0) {
return dechex($last);
} else {
return bcdechex($remain).dechex($last);
}
}
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Output for 4.3.0 - 4.3.11 , 4.4.0 - 4.4.9 , 5.0.0 - 5.0.5 , 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 , 5.3.0 - 5.3.29 , 5.4.0 - 5.4.45 , 5.6.0 - 5.6.30 , 7.0.0 - 7.0.20 , 7.1.0 - 7.1.20 , 7.2.0 - 7.2.33 , 7.3.16 - 7.3.31 , 7.4.0 - 7.4.32 , 8.0.0 - 8.0.12 , 8.0.14 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.7 82a40d8f9457fea39d7ef2a90991a1fc26e07ee1b18ac823a1994f1ad432f250 Output for 7.3.32 - 7.3.33 , 7.4.33 , 8.0.13 Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/tesWm:29
Stack trace:
#0 /in/tesWm(2): bchexdec('44e1ff2dfd8102c...')
#1 {main}
thrown in /in/tesWm on line 29
Process exited with code 255 . Output for 5.5.0 - 5.5.38 Fatal error: Call to undefined function bcadd() in /in/tesWm on line 29
Process exited with code 255 . preferences:dark mode live preview
247.44 ms | 401 KiB | 371 Q