public static int hackerlandRadioTransmitters(List<Integer> x, int k) {
        int counter = 0;
        int trans = 0;
        int minInRange = 0;
        
        x = x.stream().distinct().sorted().collect(toList());
        for(int n:x){
            if(trans == 0){
                trans = n;
                counter++;
            } else if(inRange(trans, n, k)){
                if (minInRange == 0){
                    minInRange = trans;
                    trans = n;
                } else if (inRange(minInRange, n, k)){
                        trans = n;
                }
            } else {
                trans = n;
                minInRange = 0;
                counter++;
            }
        }
        
        return counter;
    }