Rotating an array in place

本文深入探讨了一种用于旋转数组的创新算法,该算法仅使用三次反转操作即可完成任务,且无需额外空间。详细解释了操作过程,并通过示例代码进行演示。

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The answer is of course, yes. This is a trick so important that it becomes one of the frequently asked interview questions. An in-depth discussion is in Programming Pearls, one of the must-read book in Computer Science.

The trick is to do three reverse operation. One for the entire string, one from index 0 to k-1, and lastly index k to n-1. Magically, this will yield the correct rotated array, without any extra space! (Of course, you need a temporary variable for swapping).

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