Coin Change - Combinations - 1

medium
1. You are given a number n, representing the count of coins.
2. You are given n numbers, representing the denominations of n coins.
3. You are given a number "amt".
4. You are required to calculate and print the combinations of the n coins (non-duplicate) using 
     which the amount "amt" can be paid.

Note -> Use the code snippet and follow the algorithm discussed in question video. The judge can't 
               force you but the intention is to teach a concept. Play in spirit of the question.

Input Format

A number n n1 n2 .. n number of elements A number amt

Output Format

Check the sample output and question video

Constraints

1 <= n <= 30
0 <= n1, n2, .. n elements <= 20
0 <= amt <= 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
5
2
3
5
6
7
12
Output
2-3-7-.
5-7-.
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