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question_11.py
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71 lines (62 loc) · 1.27 KB
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#!/usr/bin/env python
# @Time : 2018/5/2 下午11:12
# @Author : cancan
# @File : question_11.py
# @Function : 旋转图像
"""
Question:
给定一个 n × n 的二维矩阵表示一个图像。
将图像顺时针旋转 90 度。
Note:
你必须在原地旋转图像,这意味着你需要直接修改输入的二维矩阵。请不要使用另一个矩阵来旋转图像。
Example 1:
给定 matrix =
[
[1,2,3],
[4,5,6],
[7,8,9]
],
原地旋转输入矩阵,使其变为:
[
[7,4,1],
[8,5,2],
[9,6,3]
]
Example 2:
给定 matrix =
[
[ 5, 1, 9,11],
[ 2, 4, 8,10],
[13, 3, 6, 7],
[15,14,12,16]
],
原地旋转输入矩阵,使其变为:
[
[15,13, 2, 5],
[14, 3, 4, 1],
[12, 6, 8, 9],
[16, 7,10,11]
]
"""
class Solution:
def rotate(self, matrix):
"""
:type matrix: List[List[int]]
:rtype: void Do not return anything, modify matrix in-place instead.
"""
import copy
p = copy.deepcopy(matrix)
l = len(matrix)
for x in range(l):
for y in range(l):
matrix[x][y] = p[l - y - 1][x]
if __name__ == "__main__":
s = Solution()
d = [
[5, 1, 9, 11],
[2, 4, 8, 10],
[13, 3, 6, 7],
[15, 14, 12, 16]
]
s.rotate(d)
print(d)