题解 | #顺时针旋转矩阵#

class Solution:
    def rotateMatrix(self , mat: List[List[int]], n: int) -> List[List[int]]:        
        for i in range(n):
            for j in range(i+1, n):
                mat[i][j],mat[j][i] = mat[j][i],mat[i][j]
        for i in range(n):
            mat[i] = mat[i][::-1]
        return mat