Subsets Of Array

easy
1. You are given a number n, representing the count of elements.
2. You are given n numbers.
3. You are required to print all subsets of arr. Each subset should be
on separate line. For more clarity check out sample input and output.         

Input Format

A number n n1 n2 .. n number of elements

Output Format

[Tab separated elements of subset] .. All subsets

Constraints

1 <= n <= 10
0 <= n1, n2, .. n elements <= 10^3

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
3
10
20
30
Output
-	-	-	
-	-	30	
-	20	-	
-	20	30	
10	-	-	
10	-	30	
10	20	-	
10	20	30	

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