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1.6 Given an image represented by an NxN matrix, where each pixel in the image is 4 bytes, write a method to rotate the image by 90 degrees. Can you do this in place?
LeetCode中的原题，请参见我之前的博客Rotate Image 旋转图像。
[CareerCup] 1.6 Rotate Image 翻转图像
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原文地址：http://www.cnblogs.com/grandyang/p/4653370.html
