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Boundary Elements of Matrix
Easy Accuracy: 66.67% Submissions: 895 Points: 2

Given an nxn matrix .In the given matrix, you have to find the boundary elements of the matrix.
 

Example 1:

Input: {{1, 2, 3}, {4, 5, 6}, 
{7, 8, 9}}
Output: 1 2 3 4 6 7 8 9

Example 2:

Input: {{1, 2}, {3, 4}}
Output: 1 2 3 4

 

Your Task:
You don't need to read or print anything. Your task is to complete the function BoundaryElements() which takes matrix as input parameter and returns a list containing the boundary elements of the matrix in the same order in which they appear in the input matrix.

 

Expected Time Complexity: O(n2)
Expected Space Complexity: O(1)

 

Constraints:
1 <= n <= 100

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Boundary Elements of Matrix

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