public static void main(String[] args) {
		// TODO Auto-generated method stub
		CombinationSum sample = new CombinationSum();
		int[] arr = { 2, 3, 6, 7 };
		sample.combinationSum(arr, 7);
		for (ArrayList<Integer> com : sample.result) {
			for (int i : com) {
				System.out.print(i + " ");
			}
			System.out.println();
		}

	}