Rotate Square Matrix In Place

EasyPython

Problem

Given an n x n matrix of integers represented as a list of lists, rotate the matrix 90 degrees clockwise in place. Modify the input matrix directly and return it. You may not allocate another n x n matrix for the result.

Constraints

1 <= n <= 20
matrix.length == n
matrix[i].length == n
-1000 <= matrix[i][j] <= 1000

Function Signature

def rotate_matrix(matrix):

CodePython 3

Run your code to see test output here.