You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).
Note:
You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.
Example 1:
1 |
Given input matrix = |
Example 2:
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Given input matrix = |
1 |
class { |
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i, j j, matrix.length-1-i matrix.length-1-j, i matrix.length-1-i, matrix.length-1-j
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