public static void main(String[] args) {
        int[] candidates ={7,12,5,10,9,4,6,8};
        int target = 32;
        List<List<Integer>> list = new Combination_Sum().combinationSum(candidates, target);
        for(int i =0 ;i< list.size();i++){
            System.out.println(Arrays.toString(list.get(i).toArray()));
        }

    }