Sort By Absolute Difference

//sorting by absolute diiference
//stable_sort function
//Stable Sort: The std::stable_sort function is used to sort the array based on a custom comparator. This ensures that if two elements have the same absolute difference from 
//k
//k, they will retain their original order.

void sortABS(int k, vector<int> &arr) {
       stable_sort(arr.begin(),arr.end(),[k](int a,int b){
        return abs(a-k)<abs(b-k);   
       });
       
    }