Rotate Image

Difficulty: Medium
Source: LeetCode

Description

Given an n x n 2D matrix representing an image, rotate the image by 90 degrees clockwise.

Constraint: You must rotate the image in-place by modifying the input matrix directly. Do not allocate another 2D matrix.

Example

Input: matrix = [[1,2,3],[4,5,6],[7,8,9]]
Output: [[7,4,1],[8,5,2],[9,6,3]]

Code

# To be solved