首先是旋转90度,很难想到每个位置转移对应的位置发生了变化是多少:(x,y)->(y,n-x-1)
[[0]n for e in range(n)]为什么不能写成[[0]n]*n?????

class Solution:
    def rotateMatrix(self, mat, n):
        # write code here
        a = [[0]*n for e in range(n)]//暂时没有搞懂,欢迎留言交流
#         print (a)
        for i in range(n):
            for j in range(n):
#                 x += ((mat[i][j] and ob111111111) < 9)
                a[j][n-1-i] = mat[i][j]
        return a