Algoverse_adesh_20

class Solution:
    def rotate(self, matrix) :
        """
        Do not return anything, modify matrix in-place instead.
        # """
        for i in range(len(matrix)//2):
            matrix[i] , matrix[-i-1] = matrix[-i-1], matrix[i]

        for i in range(len(matrix)):
            for j in range(i):
                matrix[i][j] ,matrix[j][i] = matrix[j][i], matrix[i][j]