Anti Diagonals
Give a N*N square matrix, return an array of its anti-diagonals. Look at the example for more details.
Example:
Input:
1 2 3
4 5 6
7 8 9
Return the following :
[
[1],
[2, 4],
[3, 5, 7],
[6, 8],
[9]
]
Input :
1 2
3 4
Return the following :
[
[1],
[2, 3],
[4]
]
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