public static void kSum(List<Integer> numbers, int target) {
        int len = numbers.size();
        for (int i = 0; i < len; i++) {
            if (numbers.get(i) < target) {
                kSum(numbers, i, target - numbers.get(i));
            }
        }
    }

    public static void kSum(List<Integer> numbers, int start, int target) {
        int sum = 0;
        for (int j = start + 1; j < numbers.size(); j++) {
            if (sum + numbers.get(j) == target) {
                count++;
            } else if (sum + numbers.get(j) < target) {
                sum += numbers.get(j);
                kSum(numbers, j, target);
            } 
        }
    }