package LeetCode;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
public class Subsets {
private List> res=new ArrayList<>();
public List
> subsets(int[] nums) {
helper(nums,new ArrayList<>(),0);
HashSet h=new HashSet(res);
res.clear();
res.addAll(h);
return res;
}
public void helper(int[]nums,List
> result=new ArrayList<>();
result=s.subsets(nums);
System.out.println(result);
}
}