import java.util.ArrayList;

public class Solution {

    public ArrayList<ArrayList<Integer>> FindContinuousSequence(int sum) {

        ArrayList<ArrayList<Integer>> lists = new ArrayList<ArrayList<Integer>>();

        if (sum < 1)

            return lists;

        int left = 1, right = 2;

        while (left <= sum/2) {

            int cur = (left + right) * (right - left + 1) / 2;

            if (cur == sum) {

                ArrayList<Integer> list = new ArrayList<Integer>();

                for (int i=left; i<=right; i++) {

                    list.add(i);

                }

                lists.add(list);

                left ++;

            }

            else if (cur > sum) {

                left ++;

            }

            else {

                right ++;

            }

        }

       return lists;

    }

}