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POcodility absolute distinct count from an array
 

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    <p>so i took the codility interview test yesterday and was informed today that i failed, unfortunately i wasnt given any other information by either codility nor the employer as to where i screwed up so i would appreciate some help in knowing where i went wrong. i know codility pays alot of emphasis on how fast the program runs and how it behaves for large numbers. now i didnt copy paste the questions so this the approx of what i remember</p> <ol> <li>count the number of elements in an array a which are absolute distinct, what it means is if an array had -3 and 3 in it these numbers are not distinct because|-3|=|3|. i think an example would clear it up better</li> </ol> <p>a={-5,-3,0,1,-3} the result would be 4 because there are 4 absolute distinct elements in this array.</p> <p>The question also stated that a.length would be &lt;=10000, and most importantly it stated that assume that the <strong>array is sorted in ascending order</strong> but i didnt really understand why we would need it to be sorted</p> <p><em><strong>IF YOU THINK I MISSED SOMETHING ASK AND I WILL TRY TO CLEAR UP THE QUESTION FURTHER.</em></strong></p> <p><strong>here is my code</strong></p> <pre><code>import java.util.HashMap; import java.util.HashSet; import java.util.Set; public class test2 { int test(int[] a){ Set&lt;Integer&gt; s=new HashSet&lt;Integer&gt;(); for(int i=0;i&lt;a.length;i++){ s.add(Math.abs(a[i])); } return s.size(); } public static void main(String[] args) { test2 t=new test2(); int[] a={1,1,1,2,-1}; System.out.println(t.test(a)); } } </code></pre>
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    1. COif a={-5,-3,0,1,-3} = 4 then a={-5,-5,-6,-6,-6} = 0 or 1? if 0 then ' a={-5,-3,0,1,-3}' should return 3
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    2. COwhy {-5,-5,-6,-6,-6} = 0 or even 1. It is 2 -> |-5| = 5 and |-6| = 6
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