Circle radius by Endres

<?while(list($a,$b)=explode(' ',fgets(STDIN)))echo($a*=$a)&&($b*=$b)?round(sqrt(($b+2*$a+$a*$a/$b)/4)).'\x0d
':die;

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

download

return to the top page