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March 6, 2018 12:44
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rotate matrix
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| You are given an n x n 2D matrix that represents an image. Rotate the image by 90 degrees (clockwise). | |
| Example | |
| For | |
| a = [[1, 2, 3], | |
| [4, 5, 6], | |
| [7, 8, 9]] | |
| the output should be | |
| rotateImage(a) = | |
| [[7, 4, 1], | |
| [8, 5, 2], | |
| [9, 6, 3]] |
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