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Mine return value was empty

Courses
,
#1

Arrays.sort(nums);
List<List> subsets = new ArrayList<>();
subsets.add(new ArrayList<>());
int start = 0, end = 0;
for(int i=0; i<nums.length; i++){
start = 0;
if(i>0 && nums[i] == nums[i-1]) {
start = end + 1;
}
end = subsets.size() - 1;

        for(int j=start; j<end;j++){
            List<Integer> temp = new ArrayList<>(subsets.get(j));
            temp.add(nums[i]);
            subsets.add(temp);
        }
    }

    return subsets;

above is my code, I’m not getting it, mine looks pretty much the same as the correct answer, but return value was all empty

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Course: https://www.educative.io/collection/5668639101419520/5671464854355968
Lesson: https://www.educative.io/collection/page/5668639101419520/5671464854355968/5654100301578240

#2

nvm, I solved it, should be <=end instead of <

#3

Hello @Li_Zengping

I dry ran your code and the problem was as you have already mentioned. It should have been <= end instead of <.