public static List<Integer> rotateLeft(int d, List<Integer> arr) {
       List<Integer> results = new ArrayList<>(arr);
for(int i=arr.size()-1;i>=0;i--){
    int index = (i-d);
    if(index<0){
         index = index+ arr.size();
        results.set(index, arr.get(i));
    } else {
        results.set(index, arr.get(i));
    }
}
return results;
}

}