[codility]Abs-distinct

// you can also use includes, for example:// #include <algorithm>int solution(const vector<int> &A) {    // write your code in C++98    //...traverse the array from both direction, and move according to the     //absolute value    int result = 0;    long long prevAbsoluteValue = -1;    for(int i = 0, j = A.size()-1; i <= j; )    {        long long absValueLeft = A[i];        //we need use llabs to get the absolute value of long long instead of abs        //to avoid overflow        absValueLeft = llabs(absValueLeft);        long long absValueRight = A[j];        absValueRight = llabs(absValueRight);        long long absBiggerNumber = max(absValueLeft, absValueRight);                if(absValueLeft > absValueRight) i++;        else j--;                if(prevAbsoluteValue != absBiggerNumber) result++;        prevAbsoluteValue = absBiggerNumber;    }    //...return result    return result;}