304 North Cardinal St.
Dorchester Center, MA 02124

# Subsets II LeetCode Solution

## Problem – Subsets II LeetCode Solution

Given an integer array `nums` that may contain duplicates, return all possible subsets (the power set).

The solution set must not contain duplicate subsets. Return the solution in any order.

Example 1:

``````Input: nums = [1,2,2]
Output: [[],,[1,2],[1,2,2],,[2,2]]
``````

Example 2:

``````Input: nums = 
Output: [[],]
``````

Constraints:

• `1 <= nums.length <= 10`
• `-10 <= nums[i] <= 10`

## Subsets II LeetCode Solution in C++

``````    class Solution {
public:
vector<vector<int> > subsetsWithDup(vector<int> &S) {
vector<vector<int> > totalset = {{}};
sort(S.begin(),S.end());
for(int i=0; i<S.size();){
int count = 0; // num of elements are the same
while(count + i<S.size() && S[count+i]==S[i])  count++;
int previousN = totalset.size();
for(int k=0; k<previousN; k++){
vector<int> instance = totalset[k];
for(int j=0; j<count; j++){
instance.push_back(S[i]);
totalset.push_back(instance);
}
}
i += count;
}
}
};
``````

## Subsets II LeetCode Solution in Java

``````class Solution {
public List<List<Integer>> subsetsWithDup(int[] nums) {
Arrays.sort(nums);
List<List<Integer>> res = new ArrayList<>();
helper(res,new ArrayList<>(),nums,0);
return res;
}

public void helper(List<List<Integer>> res, List<Integer> ls, int[] nums, int pos) {
for(int i=pos;i<nums.length;i++) {
if(i>pos&&nums[i]==nums[i-1]) continue;
helper(res,ls,nums,i+1);
ls.remove(ls.size()-1);
}
}
}
``````

## Subsets II LeetCode Solution in Python

``````class Solution:
# @param num, a list of integer
# @return a list of lists of integer
def subsetsWithDup(self, S):
res = [[]]
S.sort()
for i in range(len(S)):
if i == 0 or S[i] != S[i - 1]:
l = len(res)
for j in range(len(res) - l, len(res)):
res.append(res[j] + [S[i]])
return res
``````
##### Subsets II LeetCode Solution Review:

In our experience, we suggest you solve this Subsets II LeetCode Solution and gain some new skills from Professionals completely free and we assure you will be worth it.

If you are stuck anywhere between any coding problem, just visit Queslers to get the Subsets II LeetCode Solution

Find on Leetcode

##### Conclusion:

I hope this Subsets II LeetCode Solution would be useful for you to learn something new from this problem. If it helped you then don’t forget to bookmark our site for more Coding Solutions.

This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

Keep Learning!

More Coding Solutions >>

LeetCode Solutions

Hacker Rank Solutions

CodeChef Solutions