1 import java.util.ArrayList;
 2 public class Solution {
 3     public ArrayList<ArrayList<Integer> > FindContinuousSequence(int sum) {
 4        ArrayList<ArrayList<Integer>> array=new ArrayList<>();
 5         int plow=1,phigh=2;
 6         while(phigh>plow) {
 7             int psum=(phigh+plow)*(phigh-plow+1)/2;
 8             if(psum==sum) {
 9                 ArrayList<Integer> list=new ArrayList<>();
10                 for(int i=plow;i<=phigh;i++)
11                     list.add(i);
12                 array.add(list);
13                 plow++;
14             }
15             else if(psum<sum)
16                 phigh++;
17             else
18                 plow++;
19         }
20         return array;
21     }
22 }