PermCheck Demo Task at Codility.com

Lesson 2 – Counting Elements – PermCheck (permutation) demo task solution code written in php. Gives 100/100 score at the time of publishing. The description of the problem is copyrighted, so please see the following link for it: //codility.com/demo/take-sample-test/perm_check

Solution in php:

function solution($A) {
    sort($A, SORT_NUMERIC);
    $i=0;
    $c = count($A);
    while($i < $c){
        if($i+1 <> $A[$i++]){
            return 0;
        }
    }
    return 1;
}

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: //codility-test-questions.blogspot.com/2013/01/my-experience-with-codility-test.html