Give a N * N square matrix, return all the elements of its anti-diagonals from top to bottom.
Example 1:
Input:
N = 2
A = [[1, 2],
[3, 4]]
Output:
1 2 3 4
Explanation: Topmost anti-diagonal is [[1, ],
[ , ]]
Next anti-diagonal is [[ , 2],
​ [3, ]]
and the last anti-diagonal is [[ , ],
​ [ , 4]]
Hence, elements will be returned in the
order {1, 2, 3, 4}.
Your Task:
You don't need to read input or print anything. Your task is to complete the function downwardDigonal() which takes an integer N and a 2D matrix A[ ][ ] as input parameters and returns the list of all elements of its anti-diagonals from top to bottom.
Expected Time Complexity: O(N*N) Expected Auxillary Space: O(N*N)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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