57、输出和为S的连续正数序列

import java.util.ArrayList;
public class Solution {
    public ArrayList<ArrayList<Integer> > FindContinuousSequence(int sum) {
        ArrayList<ArrayList<Integer>> result=new ArrayList<ArrayList<Integer>>();
        int small=1;
        int big=2;
        int mysum=0;
        while(small<(sum+1)/2)
        {
            mysum=(small+big)*(big-small+1)/2;
            if(small==big)
                continue;
            else if(mysum<sum)
                big++;
            else if(mysum>sum)
                small++;
            else if(mysum==sum)
            {
                ArrayList<Integer> s=new ArrayList<Integer>();
                for(int i=small;i<=big;i++)
                    s.add(i);
                result.add(s);
                big++;
                small++;
            }


        }
        return result;
    }
}