Target Sum Subsets

easy

1. You are given a number n, representing the count of elements.
2. You are given n numbers.
3. You are given a number "tar".
4. Complete the body of printTargetSumSubsets function - without changing signature - to calculate and print all subsets of given elements, the contents of which sum to "tar". Use sample input and output to get more idea.

Note -&gt; The online judge can't force you to write the function recursively but that is what the spirit of question is. Write recursive and not iterative logic. The purpose of the question is to aid learning recursion and not test you.

Input Format

Input Format A number n n1 n2 .. n number of elements A number tar

Output Format

Comma separated elements of the subset, the contents of which add to "tar" .. all such subsets, each in a single line (the elements of each subset should be comma separated)

Constraints

1 &lt;= n &lt;= 30
0 &lt;= n1, n2, .. n elements &lt;= 20
0 &lt;= tar &lt;= 50

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input

Output

10, 20, 30, .
10, 50, .
20, 40, .

Flood Fill

N Queens