Rotate Image

Rotate an n x n 2D matrix 90 degrees clockwise in-place.

Input: rows of comma-separated integers. Output: rotated matrix, one row per line.

Input:

1,2,3
4,5,6
7,8,9

Output:

7 4 1
8 5 2
9 6 3

Reasoning:

The input is a 3x3 matrix: 1, 2, 3 4, 5, 6 7, 8, 9
To rotate it 90 degrees clockwise, we need to transpose the matrix and then reverse each row: the transpose is 1, 4, 7 2, 5, 8 3, 6, 9
Then we reverse each row to get the rotated matrix: 7, 4, 1 8, 5, 2 9, 6, 3
The final output is the rotated matrix, one row per line, with the elements separated by spaces instead of commas.