48. Rotate Image

[zwfang]

https://leetcode.com/problems/rotate-image/

You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).

Note:
You have to rotate the image in-place,
which means you have to modify the input 2D matrix directly.
DO NOT allocate another 2D matrix and do the rotation.

[codecov]

Codecov Report

Merging #35 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #35      +/-   ##
==========================================
+ Coverage   99.27%   99.27%   +0.01%     
==========================================
  Files          76       77       +1     
  Lines        1357     1365       +8     
==========================================
+ Hits         1347     1355       +8     
  Misses          6        6              
  Partials        4        4

Impacted Files	Coverage Δ
src/0048_rotate_image/rotate_image.go	100% <100%> (ø)