
Solution in php:
function solution($X, $Y, $D) {
$left = ($Y - $X) / $D;
return $left intval($left) ? intval($left + 1) : intval($left);
}
Given “AS IS”, can be ported from other languages from solutions found on the internet, please use with care.
Please note: we think that codility.com does not give a correct assessment of your real-world programming skills. For instance, reading the below would bring more understanding why: http://codility-test-questions.blogspot.com/2013/01/my-experience-with-codility-test.html
