Combination Sum [Java-Solution required]

[aditya109]

Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target. You may return the combinations in any order.

The same number may be chosen from candidates an unlimited number of times. Two combinations are unique if the frequency of at least one of the chosen numbers is different.

It is guaranteed that the number of unique combinations that sum up to target is less than 150 combinations for the given input.

Example 1:

Input: candidates = [2,3,6,7], target = 7
Output: [[2,2,3],[7]]
Explanation:
2 and 3 are candidates, and 2 + 2 + 3 = 7. Note that 2 can be used multiple times.
7 is a candidate, and 7 = 7.
These are the only two combinations.

Example 2:

Input: candidates = [2,3,5], target = 8
Output: [[2,2,2,2],[2,3,3],[3,5]]

Example 3:

Input: candidates = [2], target = 1
Output: []

Example 4:

Input: candidates = [1], target = 1
Output: [[1]]

Example 5:

Input: candidates = [1], target = 2
Output: [[1,1]]

Constraints:

• 1 <= candidates.length <= 30
• 1 <= candidates[i] <= 200
• All elements of candidates are distinct.
• 1 <= target <= 500

Reference: https://leetcode.com/problems/combination-sum/

[HatimTai1]

Sir please assign the issue to me.

[aditya109]

Hi @HatimTai1 ! Happy to receive contribution such early. I have assigned this issue to you.
Before raising a PR, please take a look at CONTRIBUTING.md and follow the guidelines.
Also, if it is not too much to ask, please consider starring ⭐ the repository. It helps boost the repo popularity and guide more people towards active contribution. That is all. Happy hacking !

[akankshatyagiat]

Hi, i would like to work on it too! :)

[aditya109]

As it has been 8 days and no response from the previous assignee, hence clearing the assignee @HatimTai1 ! 💔

[aditya109]

HI @akankshatyagiat ! I have assigned this issue to you.
Before raising a PR, please take a look at CONTRIBUTING.md and follow the guidelines.
Also, if it is not too much to ask, please consider starring ⭐ the repository. It helps boost the repo popularity and guide more people towards active contribution. That is all. Happy hacking !