48. Rotate Image

You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise).

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:

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

Example 2:

Input: matrix = [[5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16|5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16]]
Output: [[15,13,2,5],[14,3,4,1],[12,6,8,9],[16,7,10,11|15,13,2,5],[14,3,4,1],[12,6,8,9],[16,7,10,11]]

def rotate(self, matrix: List[List[int]]) -> None:
	finalls = []
	lenofrow = len(matrix[0])
	for j in range(lenofrow):
		newls = []
		for i in range(len(matrix) - 1, -1, -1):
			newls.append(matrix[i][j])
		finalls.append(newls)
	matrix[:] = finalls